In those WWII days, you could make an acceptable living doing good research. You wouldn't become a billionaire, but you'd definitely make enough to support a family. Somewhere along the line, it became a
winner-take-all gold-rush. That attracts the wrong sort of person: a bunch of miner 49ers who think they're Einstein because the system jammed a little bit of calculus into their heads before they grabbed their picks and shovels and headed west.
Here's an old, sad, joke:
What's the difference between a physicist and a large pizza? The pizza can feed a family of four.