The conundrum we're in now didn't start with higher education catering to customers who wanted future wealth. It started with employers offering high-paying jobs realizing that higher education was a sign of all the qualities they wanted, so they started mandating it. Universities adjusted accordingly.
I'm pointing out the obvious, of course, but it's because I've seen a lot of people say things like "we need to get over this idea." That's not going to happen until there is a ready supply of high-paying jobs that don't require college degrees, or until someone finds a method for achieving a high-paying job that doesn't require college but is just as straightforward and successful.