I think it would be easier to collect from non-citizens. They have the $$ and I would pay in lieu of having my place confiscated for non-payment of taxes.......I have too much invested in it.
Now there is a plan. Charge "non-citizens more make them feel unwanted except for their money. How about people who might want to buy your place or a place in a new development in the future. Wouldn't the added expenses cause less real estate activity. Less buying in town to furnish their places, less other shopping and so on down the line. Which would cause less employment.
Maybe only non-citizens who can not vote should pay all the bills then the citizens could just just vote for more spending and keep spending, the money would never end. SP could become heaven on earth and everything would be fine.