More on that point, what would service to self look like? Would a STS have children? Most would say no, but kids also have "uses", I've seen people have kids just to get a bump in their government checks. Which is obviously STS in itself.

Are they all well off? I would say no. One reason being the first paragraph example. But also because not all selfish people are rich. Just as not all rich people are STS.

It's hard to put a generalized picture of the two paths. While most people might say preachers are obviously STO, ide say most of them are manipulating their followers to live a privileged life.