Do you really think anything like that is likely to happen?
As for #1. How would a group compete seeing one has property/sale tax while the Indian owned casino does not. The casino is on "Indian land" so they are tax exempt. Correct? Unless the profit is so great they can absorb the different in taxes.
#2 I don't know what you would be taxing/levies seeing the property is considered "Indian land". Correct?
The moment the council cuts off water/sewer/power lawyers would step up to the plate. I could see "city" supplied services but I don't see "business supplied" services being cut off. The electric company isn't owned by the City/County. Water and sewer are government ran.