Even if you don't subscribe to that belief, you still have something to lose -- conscience.
Conscience doesn't really die overnight (and this is from my experience of living in a corrupt society), it's a death-by-a-thousand-cuts situation. The beginning is "Come on, everyone is doing it" and you can guess the end.
> Even if you don't subscribe to that belief, you still have something to lose -- conscience.
Integrity also works as an asset that can be lost to corruption. And for those that aren't inclined to put much stock in that sort of inner-life intangible, consider reputation as an outward facing stand-in.
Yes, but do they really start out like that, or is it a gradual descent? There's usually a catalyst that starts it in kids. Parents demanding success at all cost / rampant cheating around them (or just being surrounded by ruthless kids) / a very competitive rat race that turns out to be pretty dirty / the parents themselves are without conscience / etc.
I think children tend to be pretty cruel when given the chance, many of whom grow up to be decent people. While there are certainly bad people out there who were already rotten as children, I don't subscribe to the theory that people are born perfect and then somehow experience moral decay as they grow older.
You can look at it metaphorically. Whatever that thing is that people are talking about when they say, "have a heart!!", that's the soul. It's supposed to be your innermost self. If your innermost self becomes unethical or immoral as a habit, that's, "losing your soul."
