Taxation doesn't actually pay for much these days.
Under the current economic model, the central banks print the money and the government loans the money from them.
Whenever the government wants to spend money they get new money "printed"(it's mostly digital now that's just a stand in word)
Taxes get removed from circulation to control the inflation.
Mafia do not have a monopoly on violence or currency, that's really the only difference between the state and a large organised crime gang.