It's the easiest to change
Unfortunately, it's easiest for the wrong people to change the local laws to fit their desires. I think it works best in larger cities where there's enough checks and balances, yet it isn't ginormous like the Federal government, but small towns and many cities are EASY for a network of movers and shakers to corrupt.
I experienced some corrupt local governments in Mexico that were basically unchecked by the Feds. It led to local bosses that you had to grease, and then they supported local reps in the federal government. My company had to plan ahead and budget for bribes.
This post was edited on 6/11 at 11:55 pm