Lamar Alexander writes: It is never easy to pay for college, but the current level of generosity toward students is unprecedented. Last year, federal taxpayers awarded 60 percent of our 20 million college students $28 billion in grants and $90 billion in loans. In 16 states, two years of college is tuition free. While total student debt is high, the average loan for a four-year college graduate is about the same as the average car loan.