I would assume that all else being equal (a huge assumption there!) paying teachers the same thing in San Francisco and in Houston would give you teachers of wo

I would assume that all else being equal (a huge assumption there!) paying teachers the same thing in San Francisco and in Houston would give you teachers of worse caliber in San Francisco. That's because the cost of living and salaries in general are lower in Houston, so for the same amount of money you can hire more qualified people who have more options on the job market.