According to HoopsHype, players currently earning between $14-15 mil a year are:
19. David Lee $15,012,000
20. Omer Asik $14,898,938
20. Jeremy Lin $14,898,938
20. Roy Hibbert $14,898,938
20. Eric Gordon $14,898,938
24. James Harden $14,693,906
25. Tyson Chandler $14,596,888
26. Brandon Roy $14,399,332
27. Josh Smith $14,000,000
https://hoopshype.com/salaries.htm#sthash.6enZ04Lv.dpuf
Is Hayward not better than a few of these players? Could a change in coach help him develop into a "max" player?
Perhaps. But justifying overpaying for Hayward on the overpaying of other athletes is bad policy.