To be cynical about it, principles don't buy you Bentleys nor does it attract trophy wives. Not that I'm saying I'm superior, I also like money and the comfort it brings me, in the current system that rules the world.
Sibling comment has been modded to death by talking about players coming from countries with slavery, that seems over the top, but another online comment I've read is that in the Middle East, slavery is right there, meanwhile in the West there is a bit of distance. Who makes your clothes (probably underpaid Bangladeshi, or nowadays, Ughyurs), who makes your electronics (probably Chinese factory workers in not-so-great conditions), or who mined the minerals needed for them?