Havenoidea- I know dozens of highly successful professionals who claim to have had slacker type tendencies during HS and college. (and I knew some of them then and indeed- they were). So I think you are putting the cart before the horse here. The most generous philanthropist in my community is a personal injury lawyer from a college nobody has ever heard of and a third tier law school. Has endowed a hospital cancer center, got a library at that law school named for himself, is always the first to pull out the checkbook when an organization needs a spare million or two.
There are lots of ways to do well financially.
But I think you’ve got lots of assumptions going here which can probably be cleared up by some open dialogue. ASK your kid what he wants. ASK how he sees his current path tracking toward his future. Don’t assume. And if he’s in a bit of denial about how much shoe leather, hard work, and effort it would take to be successful once he’s launched- well, that’s why 23 and 24 year old kids don’t run the Pentagon, become CEO’s of Boeing or Merck, or are allowed to run for President.