I've warmed up to Gov. Andrew Cuomo's plan to make the state's public colleges and universities tuition-free for families with an income of $125,000 or less, and here's why: Private colleges don't like it. Since the governor announced his plan in January, private colleges have expressed concern. They argue that it would limit students' choices and place private schools at a competitive disadvantage. "Taxpayers should have the opportunity to have choice and to make a decision about what would be best for themselves and their kids," College of Saint Rose President Carolyn Stefanco told The Daily Gazette last month. Please. These schools aren't concerned about student choice. They're concerned about their bottom line. Making tuition free at SUNY and CUNY schools will boost their enrollment, as parents and students carefully evaluate return on investment and opt for the more affordable option. Elite private schools might not see a huge impact, but lower-ranked schools almost certainly would. Private colleges don't want to disrupt a system that serves them reasonably well, but if there's any industry that could benefit from some disruption, it's higher education. For decades, colleges and universities have been jacking up tuition and fees at an unsustainable rate. The cost of tuition at the small private college I graduated from 19 years ago has more than doubled, and there's no justification for it. Private schools have long excused their outrageous cost increases by pointing to the generosity of their financial aid offices, and noting that many students do not pay full price. But fewer people are satisfied by this explanation, largely as a result of soaring student loan debt. In a piece in the New Republic published last August, journalist David Dayen writes that private colleges are the real enemy when it comes to reforming higher education, because they "do incredibly well under the status quo. ... At the public level, states have pulled back funding for higher education, causing some of the [cost] incre