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Tax The Rich EU-Petition Update
(feddit.org)
We need taxes for all - also the super-rich.
"Tax the rich" is an official EU petition. The EU Parliament has to deal with it when successful.
7 EU countries must reach the quorum. And in total 1M Votes are needed. Check yours in the chart and share, cross post etc.!
The petition calls for the introduction of a wealth tax on very large fortunes. Sign the petition here
It's probably not so much you can't retire, but you can't retire with an income that you'll be comfortable on.
A brief look suggests the average pre-tax wage in Belgium is around €3800, or about €45000 per year. Assuming you already own your home, or continue to pay mortgage payments at the same rate as before retirement, your pension needs to roughly match your income to not have a drop in living standards. A €1250000 pension pot will buy an annuity that pays a bit more than that, probably around €55000 a year, but assuming you amassed that in your pension pot you would probably have been on a higher than average salary, so it's going to be close, and an annuity at that level wont increase with inflation, so your buying power drops over time, just when you're more likely to need a care home or nursing support.
Belgium has public pensions with a minimum of €1,549 per month (https://www.brusselstimes.com/344282/monthly-pension-in-belgium-to-top-e1500)
You seem to assume that 1.25 millions is supposed to be your only income, but that's not the case.
A really rough calculation (and I acknowledge I could be somewhat off here) suggests that if you contribute for 40 years, and get around 5% interest per year, you'd need to put in an average of €10,000 per year to reach €1,250,000. Working out average salary progression through a working life is left as an exercise for the interested reader, but assuming you're putting 10% of your salary into your pension, you'd need to be earning six figures to make that pension pot, so a drop to around €73,000 including the public pension could be hard to manage.
As I said, not so much can't retire, as can't retire at the same standard of living, especially as annuity payments wouldn't increase with inflation.