It would be infinitely easy to do this with Bitcoin, you could have and all anonymous all remote workforce. Wait, that's already how open source works for the most part.

Unfortunately due to US laws around employment, that isn't remotely legal. You need to pay payroll taxes and withhold income taxes for your employees, and that requires SSN/ITIN.

If your employees reside in a US state, you usually have additional obligations there related to state income tax withholding or state unemployment insurance, as applicable.