First of all, it's all six colleges and not just Sixth College.

Also, the students on the trip will still learn about history as well as supporting the Indian tribe running the casino.

lol

If you ask me, giving the Indians casinos has to be demotivating for them. Who wouldn't wanna drink a lot if the main point of the tribe was to run a freaking casino?
Of course, have you ever thought that whoever was running the program was like, hey, I have money, let's make some dumb excuse and take the kids to a casino where they can have fun? The stated purpose of the program is obviously bullshit (my first impression was about the same as yours), so maybe there's another reason behind it. Hey, that reminds me. Wasn't there some stupid change to university rules regarding gambling recently, making it harder for orgs to use gambling-related activities for financing?
I think the university randomly sponsors programs, for random reasons, then hires some dope fiend to come up with politically correct reasons later.
I really shoulda made some dumb stupid org, bilked A.S., the college councils, the deans fund, and all extra sources of argent for all they were worth, waste all the money, then repeat every year. If you're a freshman, I urge you to do that.

It's an education on exploitation! First, the Americans exploited the Indians, and now it's time to turn the tables! Learn exciting topics such as the laws of probability and the gambler's ruin. You'll almost WISH your retirement pension was burned through this way.