Collier presents migration as a paradox: While migrants are the biggest economic winners, they also bear significant economic, social, and psychological burdens, deepening his exploration of The Role of Integration and Assimilation in Multicultural Societies. He views migration as an investment but shows that the forces driving economic mobility also fuel instability, competition, and alienation. His argument does not advocate for or against migration but instead exposes its contradictions, trade-offs, and unintended consequences.



One of Collier’s central claims is that migration delivers enormous wage gains to those who move, but these gains are not the result of individual effort or talent. Instead, they stem from the structural characteristics of high-income societies. Wage differentials, such as a Haitian worker earning 10 times more for the same job in the US (146), show that migrants do not suddenly become more productive. Instead, they benefit from a system that boosts productivity. Collier cites experiments, such as the US and New Zealand visa lotteries, where migration opportunities are randomly assigned. Lottery winners, despite being selected by chance, often achieve economic success, undermining the idea that migration rewards only the most skilled or ambitious (147). Their success shifts the focus from individual effort to the structural advantages of host countries. 

Rather than proving meritocracy, migration reflects the luck of birth and opportunity. Collier’s framing challenges the notion that migration is purely a story of self-improvement and hard work. Migrants are not inherently more talented or industrious than those who stay behind; they simply escape social models that stifle productivity. This perspective leads to a broader claim: If success depends on where migrants go rather than who they are, their arrival also brings economic disruptions and social tensions that they must shoulder.

Collier rejects the idea that migration always lowers wages for native-born workers, claiming that migrants compete mostly with each other. Instead of a struggle between locals and newcomers, he describes immigration as a system where the toughest competition happens within migrant communities themselves. This claim disrupts common political narratives. While public debates on immigration often assume a conflict between migrants and native-born workers, Collier suggests that previous waves of migrants have a vested interest in limiting future immigration to avoid wage suppression. His argument challenges the assumption that all migrants support open immigration policies—they, too, have something to lose.

Collier presents intra-migrant economic competition as a self-perpetuating cycle of unstable labor. Each new wave benefits from the host country’s economic structure but faces immediate pressure from earlier arrivals, keeping financial progress uncertain and highly competitive. Diasporas help sustain this cycle by easing migration through financial aid, housing, job connections, and social networks. While these communities reduce barriers, they also influence migration patterns in ways that conflict with host country policies.

Family-based migration often works against skill-based immigration policies, complicating The Balance Between Humanitarian Goals and National Interests. While many countries claim to prioritize high-skilled workers, most migration happens through family reunification, bringing in dependents rather than higher earners. Collier warns that by valuing family ties over education and job skills, host countries unintentionally encourage lower-skill migration, making long-term integration more difficult. Diasporas also create financial obligations that extend beyond migration itself. Migrants regularly send remittances home, adding to economic strain even after settling abroad. Collier notes that these payments tend to be small and frequent rather than larger, more efficient transfers, suggesting that financial support is not just practical but expected. As a result, higher wages do not always translate into financial security, complicating the idea of migration as an economic solution.

Collier believes that higher wages do not always lead to greater well-being. While migrants earn more, they also face cultural dislocation, loss of social connections, and psychological strain. To support this, he draws on studies of Tongan migrants in New Zealand and rural-to-urban migrants in India. Four years after a group of Tongans migrated to New Zealand, lottery winners had quadrupled their incomes—an outcome that might seem like an unquestionable success. However, their self-reported happiness declined. This finding suggests that while migration improves financial stability, it also brings stress, alienation, and emotional loss, complicating the assumption that economic mobility ensures a better life. Rural migrants in India who moved to cities increased their consumption by 22%, but they did not rate themselves any higher on the “ladder of life” (172) scale. Instead, they expressed nostalgia and a sense of detachment, suggesting that migration actually disrupted their social and emotional lives.

Collier warns that, in some cases, psychological displacement can persist across generations. If migrants remain socially marginalized, their children may continue to experience identity conflicts, exclusion, and resentment, preventing full integration. In this worst-case scenario, migration does not function as an investment in a better future but as a persistent state of alienation. This conclusion challenges traditional views of migration as a simple trade-off between short-term sacrifice and long-term gain. Instead, Collier suggests that migration’s success depends on both economic stability and social belonging—factors that are often in tension.