Sorry if this is an extremely stupid question, but... Why should it cost the Sims money to go to university? It isn't like that in real life.
EDIT: Nevermind, turns out it does in the US.
It's the same anywhere, whether you prefer to have it rolled up as "taxes" or just pay for it yourself. I prefer the direct method.
On the other hand, isn't it good that people with less money can still get a good education?
I guess it's up to every person to decide what to think. But here in Denmark, university is paid through taxes.