Re: The tax amount in SimCity buildit
The tax rate isn't a percentage of the population. I'm not sure exactly how the number is determined, but it's definitely a function of more that just city size. For example, my population is 536,012 and my taxes are 19,372 per day (27.67% of the population number). Then I had Vu destroy some stuff, and my population dropped by 11,198 to 524814, while my taxes dropped 53 down to 19319 (27.17% of the population).
None of the other percentages match up either (percentage losses, etc). My guess is that the tax total is a function of a number of different factors, which may or may not be "actual" population versus "bonus" population, and possibly higher percentages per person for luxury RZ's compared to premium RZ's compared to standard RZ's. Then it may also factor different numbers for Tokyo RZ's.
I don't know if anyone outside of the EA devs really know for sure, but if you look through the forum you'll see plenty of information and discussion that eventually leads to no definitive answer. 🙂