I’ve worked as a contractor for TRS inc. (www.gotrsinc.com)
They’ve handled everything from hourly workers to $150/hour professionals. Long term “contracts” have gone on for years. I put it in quotes because if the employer stops paying then the contractor is gone overnight.
They simply plan on paying the penalty for not offering insurance.
She accidentally stood me up for an appointment once. When I arrived, her assistant handed me an envelope with the full cash payment for the services I had been scheduled to render, including my transportation costs and a little extra for my trouble.