I think the impact of this phenomenon is partially mitigated by globalized finance, i.e. I can save/invest my money in countries with different demographic prof

I think the impact of this phenomenon is partially mitigated by globalized finance, i.e. I can save/invest my money in countries with different demographic profiles than my own. Capital won't stay in countries where everyone is trying to retire early - it will flow to countries where it is relatively scarce and earns a higher return.