Given the millions of unemployed Americans, it seems this is not true for at least some occupations. Wal-Mart greeters can be wonderful people and I'm not sayi

Given the millions of unemployed Americans, it seems this is not true for at least some occupations. Wal-Mart greeters can be wonderful people and I'm not saying they aren't valuable as humans. But in labor market terms, there is clearly not a shortage of them.