I hear you.
Limiting the size of treasury doesn't work well, because it needs to be very large to enlarge the temples after a while. And while I originally thought those prices were just insane for the higher-up levels, every world in the game has a couple huge temples.
But I understand that a constant money drain is not much fun. Still, I want to tax temples, to make them not banks and also to keep money moving around. But I hear you. So here are two ideas to solve the issues:
a) change the tax amounts - half taxes for guilds, and quarter taxes for temples. I could also add a "tax free" minimum amount, maybe 10-50 gold per size. That would give the temple some amount to cover regular expenses with that is not taxed.
b) change the tax type - I could store the amount of gold put into the treasury between tax days, and tax only that, i.e. turn it into an income tax. This would also reduce the lord = massive balance problem a little, but it would reduce income through guildhouses dramatically.
