I hope you're prepared to pay quite a bit more for your schooling, then. My wife is a non-tenure-track PhD and she spends probably 6 hours preparing for each one-hour lecture. She must give eight unique lectures per week. That's 48 hours of prep before you count grading and creating assignments. And she's not even expected to research/publish like tenure-track faculty are.

For this, she gets paid less than 50K per year. If you could halve her workload, she could create better lectures and better assignments and grade with more detailed feedback. But then the university would have to hire two of her to teach the same number of students.