As long as colledge education is prevented from experiencing the market controls provide by a free market, tuition will continue to rise.  There is no incentive to stop asking for more money.

Stop the subsidies. 

Stop the federally insured and provided student loans that bury students under massive debt when they graduate.

And enrollment will drop.  And the colleges WILL have to lower tuition to attract students back, as well as cut frivolous, non-career advancing courses and degrees to cut costs. 

The free market works, but it is rarely allowed to.  I wonder why that is?