In western eirope such us netherland switzerland germany its all about your education and papers...not about who you are and what are your human qualities unless you have super good education you have zero opportunities in western europe also.
I know many people who were raised in Eastern Europe and got well paying jobs in the West and never even had to leave their town. They are all working in IT and most of them are self taught. Mostly back end devs, but also support specialists and so on. Many Western companies hire in Eastern EU because it's cheaper for them and there's even more skilled people there. Now imagine that you live in Eastern EU where everything is much cheaper and you get a Western EU pay, while working from home.
I don't know what level of being rich you're talking about. If by rich you mean that somebody is flying a private jet then maybe you're right, but if you're talking about living in a new house with a big garden, having 2 cars one for daily driving and one for fun, being able to travel, then it's achievable in any EU country. You just need to be good at something other people aren't. For instance, I have a friend whose mother is a doctor doing all those beauty treatments like BTX and she earns a lot. They have apartments all around Europe (Germany, Italy, Austria).