Paying taxes is part of being an NCR citizen. If you won't pay the taxes then they obviously aren't obliged to keep you.

Being that it is a democratic state there is no guise.

Except that of course they are an expansionist state and if you want to live in the settlement your family has lived in for generations, you have two choices when they annex your territory pay heavy taxation or get out of NCR territory.

In any case not seeing a difference between an Power Armored guy annexing your area, then taxing you and a poorly equipped conscript......except you get to vote in corrupt elections where the Cattle Barons actually decide who is elected and actually run the country.

Pretty close to current 1st world democracies, honestly.