I'm a big fan of the concept of an universal basic income. Where everyone gets ~1000€ every month from the government. For children, the parents get the money.
And I mean everyone. Every legal resident. Including billionaires.
To finance it I would tax both income and capital gains at ~50%. From the very first € you earn.
The net tax load on most people would not actually change much. But it completely gets rid of situations where if people work more, loose their benefits and end up with less.
1000€ should be just about enough to life a frugal lifestyle. A flat with a partner or flatmate in a small town. Produce to cook a flexitarian diet. A public transport pass and a bicycle. A Samsung Galaxy A17 with an internet plan. And all those other real necessities of life.
If people want luxuries, they will still have to work. Someone still has to produce those consumables after all. But everyone should be able to get all of their basic necessities covered.