"As others have pointed out here, the reason degreed people are better plumbers is because they were smarter to begin with, ..." Truth. The lion's share of inc

"As others have pointed out here, the reason degreed people are better plumbers is because they were smarter to begin with, ..." Truth. The lion's share of income variation is explained by IQ. That is, statistical studies have shown that for a given IQ level, income is only weakly correlated to race, socioeconomic background, educational attainment, and so forth.