There's no such thing as 'non-profit'. Every human being has to fight for 'profit' to survive. Profit is calculated after administrator or executive compensation is subtracted from revenue, so therein lies the motive of the non-profit.
There are definitely non-profits with really high administrator and executive compensation that don't spend money optimally to meet their stated goals. I'm interested in discussing the degree to which colleges resemble this type of non-profit.
What are all the high tuitions being used for, and how efficiently are they being used? To start to answer that question, I think I need to understand more about the goals of non-profit colleges and who sets most of the policy (high-paid administration? professors?).
My guess would be the high-paid administration, which definitely seems to be a problem.