Capitalism rewards greed (or more accurately capital accumulation). It doesn't reward evil, evil is a side effect of prizing capital accumulation above any moral framework. Like the paperclip maximizer, capitalism is cold, calculating, and without morals, resulting in one thing: maximization of profit.

If, in some parallel universe, the best way to maximize capital accumulation were to ensure well-being for everyone (stay with me here), then that is what the bourgeoisie would do. They are not evil, they are amoral.