I'm reasonably well paid, and pay a lot of tax. I can save quite a bit. I could afford to live for 5 years from my savings without working. But not forever, so I still work.
But if someone was to give me 800 euro a month then I could live of my saving for maybe 20 years instead. Certainly long enough to get to retirement....
So why would I work? I wouldn't. So not only would this cost 800 euro a month directly but also the 4000 euro a month in taxes I would have paid.
It doesn't take many people to do the obvious thing...