> Because without an income stream no one loans to the government
The government prints whatever money it needs to pay its bills, and does so already with impunity. It also pays interest on money loaned to it (bonds) with printed fiat.
Also, you completely missed the point. Of course taxes “do things”, and ending them would also “do something”. That wasn’t the question.
The question is simple, why pay taxes at all when the government has the ability to print an endless supply of money?