>>507118465>the ones actually contributing to societyIn labor market theory, a labor supply shock (such as an immigration wave) will suppress wages to w_1 (the reason is that in a competitive labor market, wages equal the marginal product of labor, and if there is now a surplus of labor relative to capital. the marginal product of labor is reduced). In the long run, wages recover to w_0 as the capital stock increases to a new equilibrium point. However, if there is a continuous stream of immigration, wages remain suppressed forever
Seasonal farm workers is probably the only area where low skill migrant labor might be good, because otherwise there is a risk that farming land might remain unused if wages get too high. However, you have to prevent them from working any other job and make sure they leave as soon as the picking season is over, otherwise they will start suppressing wages in other jobs