The only real billionaires of my country are the founders of Wise and Bolt. They all made their money from startups that succeeded internationally and none of them particularly politically active. One of the Wise guys is actually building a car-free "five minute city" block in the capital. The biggest problem is a actually a guy with under 100 million net worth who runs a small bank (called bigbank, ironically), keeps donating to the conservatives and his individual contributions are like 10-20% of the entire country's political donations put together or something. It's like eroding LGBT rights is his life goal or something.

All that doesn't change the fact that since the population is aging, rather than people of all ages dying off evenly at once, things will get harder to maintain, as everything we enjoy in life still requires someone to do work, regardless of economic system - and old people still require resources to maintain (and more labour to maintain than young people)