Why did some Iranians oppose the Shah?

Constitutionalist, Marxist, and Islamist groups opposed the Shah: ... based inside the city center elegance, this become a section of the populace that become fairly secular and wanted the Shah to stick to the Iranian constitution of 1906 in place of spiritual rule.

Explanation:

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.