"Facts on the Ground"{
"Also, those casinos do have some federal oversight. Too much funny business on the part of a tribe and the feds will start to take a look."
The oversight is that of a typical non-enforced regulation.
A couple of years ago, it was revealed that the Seminole tribal "elders" have, for years, siphoned off large chunks of casino funds - using the cash primarily for real estate additions, expensive sports cars, etc.
Reminds one of the Mob practice of "skimming" revenues in Las Vegas.
In any case, when informed that funds were being 'disappeared' - the tribe was told that that was not appropriate. No action was ever taken.