Serfs and peasants were stuck in their position? Is that what you’re looking for?
I’m going to say d plantation owners
The name that given is Muckrakers
The term was popularly coined during the development of early progressive era in the period of 1890s - 1920s.
Back then, the government and the establishments were known to be really corrupt and many Muckrakers started to do investigative journalism to find out the truth about their practice.