They should get paid. The press should pay them. The college pays the press. The students pay the college. The press releases information for free.
The authors are "the press". So they somehow pay themselves?
So you're saying colleges will just increase tuition to cover the cost of textbooks right?
Then students will just end up paying more in tuition, possibly more than the costs of textbooks. That extra money of course will go to increasing either/both the university president's or lead football coach's salaries.