Thirty years of massive university access have produced a silent paradox. In 29 OECD countries, children of parents without degrees retain 45% fewer chances than those of educated parents to reach the top income quintile. This fracture persists despite a democratization of credentials that has transformed universities into bachelor’s degree factories.
Educational expansion created formal equality without real equality. While lecture hall seats multiplied, affluent families shifted their advantages toward less visible mechanisms. Networks, cultural codes, internships: the arsenal of social reproduction became more sophisticated faster than schools became democratized.
The Essential Points
- 45% gap in social mobility chances persists between children of graduates and non-graduates in the OECD
- The share of a generation accessing higher education doubled between 1990 and 2020 in developed countries
- Affluent families compensate for credential democratization through networks and cultural codes
- Credential inflation devalues the exchange value of diplomas for working-class families
Democratization of Credentials Did Not Break Social Heredity
Between 1990 and 2020, the proportion of a generation accessing higher education doubled in most developed countries. France went from 26% to 52%, the United Kingdom from 31% to 58%, the United States from 39% to 69%. This massive expansion was supposed to mechanically reduce inequality by opening universities to children from modest families.
OECD data reveals the failure of this promise. The gap in chances of reaching the top income quintile between children of graduates and non-graduates remains frozen around 45% in the 29 countries analyzed. This stability persists across decades despite the multiplication of university places.
South Korea illustrates this paradox to an extreme. 95% of a generation accesses higher education, transforming the country into a laboratory of educational democratization. Yet intergenerational social mobility there stagnates at levels comparable to the United States, where only 69% of a generation continues after secondary school.
This constancy reveals that social reproduction operates through channels other than formal access to degrees. School produced equality in access, not in outcomes.
Credential Inflation Devalues the Social Elevator for Working-Class Families
Massive educational expansion created a perverse effect: credential inflation. When 70% of a generation earns a university diploma, it loses its distinctive value on the job market. Employers mechanically raise their requirements, transforming yesterday’s high school diploma into today’s bachelor’s degree.
This devaluation strikes first at modest families. A worker’s child who earns a degree in humanities from a mid-tier university does not have the same assets as a manager’s child with the same qualification. The diploma alone is no longer sufficient to guarantee social advancement.
France documents this phenomenon precisely. Between 2000 and 2020, the share of higher education graduates in the active population rose from 31% to 47%. Meanwhile, the unemployment rate for young graduates with three years of higher education and no experience climbed from 8% to 14%. Credential inflation erodes the return on educational investment for those who have only the diploma.
Graduate surveys reveal that the quality of employment obtained now depends less on degree level than on peripheral factors: prestige of the institution, family networks, overseas experiences. These advantages remain concentrated in already-favored families.
Affluent Families Shift Their Strategies Toward Networks and Codes
Facing credential democratization, privileged families have become more sophisticated in their social reproduction strategies. They no longer bet on the exclusivity of university access, but on the differential quality of that access.
French grandes écoles illustrate this shift. While universities open widely, business and engineering schools maintain their selectivity. Sciences Po Paris counts 23% of children of senior executives compared to 34% in the general population, but this overrepresentation concentrates on the most prestigious programs.
The phenomenon extends well beyond France. In the United States, access to elite universities (Ivy League) has remained stable since 1990: 70% of students come from the wealthiest 20% of families. These institutions function as conservatories of social capital, where networks are transmitted as much as knowledge.
Affluent families invest massively in distinction signals: private tutoring, language trips, internships in family businesses, costly extracurricular activities. These investments create differentiated CVs that the diploma alone cannot match.
Mastery of cultural codes remains decisive. Children from educated families arrive at university with ease in social interactions, familiarity with institutions, a sense of informal hierarchies. These tacit competencies count as much as formal knowledge in professional success.
Companies Reinforce Invisible Barriers to Recruitment
The job market amplifies inequalities that schools have not resolved. Companies develop selection criteria that structurally favor candidates from privileged backgrounds, even with equal credentials.
Recruitment in the pyramid of junior staff teetering in major American firms reveals this dynamic. Major firms no longer recruit solely on credentials, but on the ability to navigate complex social environments. A Goldman Sachs internship is worth more than a master’s in finance.
Soft skills become decisive. Communication, leadership, adaptability: these competencies are acquired in stimulating family environments and varied social experiences. Children of managers naturally master these codes, while children of workers must learn them.
The explosion of unpaid internships widens the gap further. 60% of students complete at least one internship during their studies, but not all can afford to work unpaid for six months. This financial barrier de facto excludes students from modest backgrounds from the experiences most valued by employers.
Recruitment algorithms reinforce these biases. Automated systems favor profiles that resemble existing employees, mechanically perpetuating the overrepresentation of privileged backgrounds. Technological innovation in human resources reproduces social inequalities under the guise of objectivity.
Alternative Models Emerge to Bypass Educational Impasse
Facing these structural limitations, several countries are experimenting with alternatives to democratization through quantitative expansion.
Germany maintains a dual system that values professional apprenticeship. 60% of young people choose vocational training rather than university. This path guarantees concrete outcomes and limits credential inflation. Salaries of German vocational training graduates often equal those of university graduates.
Switzerland pushes this logic further. Specialized universities offer practical training at university level without traditional academic prestige. This diversification of paths to excellence reduces the concentration of aspirations on a single model.
Companies develop their own training systems to circumvent educational rigidities. Apple, Google, and Amazon create internal universities, recruiting on skills rather than credentials. This strategy partially short-circuits social reproduction by valuing direct performance.
Programming bootcamps democratize access to technical careers in a few months. These intensive programs attract diverse profiles, often career changers, and boast insertion rates superior to certain university master’s programs. Their success reveals the growing inadequacy between lengthy training and economic needs.
Some universities experiment with admission based on social rather than academic criteria. Sciences Po introduced geographic and social quotas that substantially modify its student profile without degrading results. These deliberate policies break the machinery of social reproduction.
Educational expansion democratized access to lecture halls without democratizing access to elites. Privileged families shifted their advantages toward less visible but more effective terrain. This sophistication of social reproduction questions public policies centered on formal equality. The next generation of reforms must tackle the invisible mechanisms that perpetuate social heredity, beyond diploma access alone.
Sources
- OECD - Intergenerational Social Mobility Across OECD Countries
- OECD Education at a Glance 2023
- INSEE, Enquête Emploi en continu
- Observatoire des Inégalités, Rapport 2024