I think it's a misunderstanding of rich people to say they're spoiling their kids this way. They're simply introducing them to their standard of living. I mean, a lot of 16 year olds don't pay for their bags - it's just that the rest of us can't afford Birkins. I'm not sure that I'd think any higher of a 16 year old who didn't buy their own no-name bag. Parents mostly end up teaching their kids what level of spending is acceptable and for rich people, that is a very high level of spending. For those people what they'll have to work for is the mansion or the Ferrari, not the bag.
All I can say is I hope the kids can sustain that level of income themselves after school, otherwise they'll have some unsustainable habits.
I agree with you. People on different income brackets do think differently.