If my county passes a new tax for um lets say a new jail. They staff it and build it and everything with the tax money. How come it seems the tax is there forever? Why not get rid of it when built?

Taxes are unpopular necessary tools in the governmental toolbox. They are often marketed to the people as temporary necessities. And then the weeds of time grow over these intentions, people forget, and they're here to stay.

Germans still pay a sparkling wine tax. It was introduced to be able to increase military funding before WW1. They have since gone from a monarchy to a republic to a murderous dictatorship to an occupied territory to two republics side by side (at least in name, the east got rid of the tax) to a unified republic. Guess what survived for more than a century?