Welfare is funded by taxes. Is not paying tax a civil offense or criminal in the US or Netherlands (your countries of residence) or Germany (admitsWrong’s)?
No, simply not paying taxes is a civil offense, not a criminal one. They will come and take your money, but no risk of jailtime in and of itself.
Now it can be criminal but only indirectly. Like lying on your tax returns can absolutely be criminal. But simply not filing them at all, and therefore not paying taxes is not.
What if you refuse to give them your money?
Then they will just take it by either directly taking it from your bank or by calling your employer and directly taking it from your paycheck before you get it.
If you have no bank account, or pay check they may take your property in a lawsuit such as putting a lein on your home. But it wouldnt be criminal to simply not pay. Civil cases dont become criminal when you dont pay. However if a judge makes a very explicit injunction in a civil case that you arent allowed to do something, and you do it anyway, then it can cost you much much more. If you misbehave in court you can get jailtime for contempt too, but again thats a bit of a stretch.