"Jab, who is more likely to steal something?"
I have found that the people who steal are those who are put in a position to do so and lack moral character. It can be a $5/hour clerk at a gas station, or it can be a $200k/year consultant. I've seen both, and everything in between. The truth is that dishonest people come in all shapes and sizes and come from all sorts of backgrounds and income brackets. Even if retailers were to double their wages, I doubt it would have any noticable effect on the amount of shrink they suffer.
That's not saying I support Wal-mart's generally poor wage policies in any way. However, those who dislike the wages Wal-Mart pays can thank the free market economy for that--Wal-Mart wouldn't pay such low wages if they couldn't find people to work for it, or were regulated to pay higher wages.
J_A_B