No. 1: living expenses in West Texas are far lower than even here in Maine, where the salaries are below Texas - and Texas, in addition, doesn't have state income taxes.
No.2: Pay them more if you want them to teach better???
How would that rationale work in the 'real' workaday work place?
"Hey, boss, you want me to do a good job. Pay me more!" That modus operandi would get the employee a boot out the door.
It works the other way around...in the real world.