Why Are College Tuition Costs Rising So Much?

Why Are College Tuition Costs Rising So Much?:
Quick quiz: 
What two industries have seen the steepest rate of inflation in the economy over the past decade? 
If you said energy or housing, you’re wrong.
 The correct answer is education and health care.
The first of these isn’t too surprising to anyone with a son or daughter enrolled in college.
One of my sons goes to Northwestern University, and the cost is stratospheric: $62,000 a year.
Can the college degree he will be handed soon really be worth nearly $250,000?
Across the country, tuition costs have basically tripled in 20 years.
The same is true in public grade schools and high schools. 
Per-student spending has roughly doubled in just the past 15 years. 
Yet test scores have been flat or have drifted down.