@HeliosPi You mean 1/3 of income, for rent?

The guideline when I grew up was that you shouldn't spend more than 30% of your income (slightly less than 1/3), so... you're not wrong.

I'd say it should be more like basic income tax: income, minus reasonable living expenses, then take a percentage of that.

If all of your paycheck goes to basic living expenses, then your rent should be free.

Property tax should be figured the same way; right now, it's too much a tool for rich people to get all the currently-"desirable" spots because nobody else can afford to pay the taxes (even if you've been living there for a long time).