I wouldn't say they all quit, but they ultimately have to settle in less prestigious and less funded labs/universities.

I've met countless great scientists in Italy which were ultimately wasted as professors and achieved little as scientists.

I'm not saying that teaching isn't important, but it's a skill completely unrelated to being a good scientist, there's no overlap at all.

There are so many other ways to make money that don't involve crime. And there are even many crimes that make more money that are far less harmful to society.