What a typical spurious libertarian argument. "Taxation is theft." Governments have the right to tax their citizens and businesses. If you defy the law you risk punishment. That's not extortion.
How do you figure they have the right to theft? Are they of the aristocracy or nobility? Laws are only a question of who is in power, does not mean it is right. Remember slavery was once legal, it was within the law.
indigenousfoundations.arts.ubc.ca
Residential schools were once legal. Apartheid was once legal.
Punishment is what robbers do. They try to extort and threaten to do something bad to you if you do not hand them your money, that is what government does.
Like Thomas E Williams said "If one person has a right to something he did not earn, of necessity it requires that another person not have a right to something that he did earn."
"There is no moral argument that justifies using the coercive powers of government to force one person to bear the expense of taking care of another."
"No matter how worthy the cause, it is robbery, theft, and injustice to confiscate the property of one person and give it to another to whom it does not belong."
The income tax act was supposed to be a temporary measure to fund the world war but it was never removed. Since then government spending has exploded. People pay more then half their earnings in taxes so politicians can live the life of luxury.