I don't know where you get that info from but I think your wrong. The tuition assistance comes from the Tribe or Nation NOT from the Government.There are some college and universities that do give assistance to Native American students but you have to be at least 25% Indian blood.
I know it is a widely believed mith but it is true to an extent its not all schools or all tribes but there are schools here that have a tuition waiver for native americans and its not from the tribe. The tribe Abenaki from Vermont actually voted down a Casino or anything else, which I respect and is very honorable but the fact of the matter is they (they meaning members living on tribal land) are all very poor and live hard lives.