Not quite sure I followed everything you said.
The sad reality is, many people who are classified as independent contractors are really employees. The employer simply has too much control and the IC has never made an investment and has no real risk of running a loss.
https://www.irs.gov/businesses/small-businesses-self-employed/independent-contractor-self-employed-or-employee
For an agency with workers, anyone sitting at a desk is almost certainly an employee. Outside people may or may not be an employee, it really just depends on the level of control.
If you tell someone what to do, when to do it and how to do it all while controlling how much they get paid, they are almost certainly your employee under the law.
Big 10-4 to that Vol.