@IzzoOne : Not sure that I agree with your conclusion that UT-Austin has an $18 billion dollar endowment.
Aren’t the figures that you cite fluid among the universities in the UT system ? Meaning that as needs of a particular university within the system change, that its share of the endowment income can increase temporarily ?
Equating percentage of endowment income allotted to UT-Austin doesn’t mean that it is a permanent allotment or that UT-Austin therefore has a particular percentage of the underlying endowment principle / fund. While UT-Austin “can get more”. so can the other universities within the UT system, just as UT-Austin could get less.