Retirement accounts are a thing in Europe though. In Poland for example there's IKE and IKZE. IKE is a bit simpler of the two. If you hold your money on IKE until you're 60 you're not paying taxes on that. Can invest in stocks or bonds.

There are options to save extra for retirement, if you take a private pension or a bank account that you can't withdraw from until retirement for example; in that case, you don't pay wealth tax and only pay taxes when it starts paying out. Sometimes the money you put into it is tax deductible, too. But, that's in NL, I don't know anywhere else. Source: https://www.nibud.nl/onderwerpen/pensioen/pensioen-opbouwen/

6 figures is possible, there are/were some software companies (VC backed, US based, US startup style, FAANG) that pay that much, otherwise there's highly paid jobs like management, doctors/dentists, landlord, public motivational speaker, drug dealer, etc that can earn you that much. But it's not handed to you like it feels like it is in the US / SF, but I realize that's very much a unique bubble.

So yeah, basically none of your comment is true, it's just not talked about as much because our basic systems are alright for most people and few have the extra income to think about doing more with it.