Yep. As a matter of fact, it mostly is.
A pimp is a manager. His job is to find the white "Johns" who will pay more money and cause less trouble. Girls with pimps often earn more money than girls without pimps, even after giving the pimp his customary 25% cut. Most pimps are guys with day jobs and not the Cadillac-driving, leopard-skin cape wearing Hollywood cartoon.
Sorry, show me some studies that show me otherwise.
For starters, read this:
Second, travel to the Middle East and spend some time with some Russian girls. I have. They have interesting stories to tell.
If everything you know about hookers, you've learned from Hollywood and the tabloid fake news, you probably don't know much about hookers.