The first thing to understand is that there is no uniformity between the institutions in the ULS.
The story I heard on our low tuition was that it was suppressed by a legislator from Iberia parish who felt the burden to the poor of Acadiana should be minimal. I believe he was an LSU grad. Additionally the schools had to get legislative approval for increases until recently when the state decided to make the students carry a bigger burden. So now we are incrementally getting to others in the ULS, and LTUR & UNO in particular.