Arizona teachers want more than a 20 percent raise over the next three years, which is all that Republican Gov. Doug Ducey promised. If school funding isn't restored to where it was 10 years ago and more tax cuts ensue, the wealthy will continue to buy a better education while the poor will get an inferior one.

In this article on Vox April 26, 2018:

It’s an ideological aversion to taxes. It’s a governor and legislature who have not only said they will never raise taxes but cut taxes every year. And we’ve done that for 25 years. 

— Tom Rex, who is the associate director of the Center for Competitiveness and Prosperity Research, a unit of the L. William Seidman Research Institute