Tax students, or polluters?

From Robert Reich’s blog:

A basic economic principle is government ought to tax what we want to discourage, and not tax what we want to encourage.

For example, if we want less carbon dioxide in the atmosphere, we should tax carbon polluters. On the other hand, if we want more students from lower-income families to be able to afford college, we shouldn’t put a tax on student loans.

Read his post here.