I also know a family whose father gave them their inheritance when they turned 22. Instead of getting jobs after college, all but the eldest (who already had a job) spent several years bumming around their apartments, paid for by their dad, and failed to launch. Their careers still haven't recovered.

YMMV. I do think it's better to give money to people who are already succeeding and could just use a bit of acceleration or a chance to do something riskier, though. At earlier stages advice and introductions are often more useful in the long term.