Taxes are like abortion and not just because both are grotesque procedures supported by Democrats. You're for them or against them. Taxes go up or down government raises taxes or lowers them. But Democrats will not let the words 'abortion' or 'tax hikes' pass their lips.
State governments generate less revenue in a recession. As state leaders struggle to make up for lost revenue legislatures tend to cut funding for higher education. Colleges in turn answer these funding cuts with tuition hikes.