Mohammed Reza Pahlavi chooses more competent advisors and listens to them and steers Iran towards a constitutional monarchy by the mid 1980s. He also chooses non-alignment and keeps his military spending to a necessary minimum, preferring improved training instead of blowing millions on useless and unnecessary weaponry and jet fighters.
Also he doesn’t spend money as lavishly on the Persepolis celebration and keeps it in line with Iranian traditions instead of wasting millions on outside products and services