What you might need a company for is to pay sales taxes you charge for physical goods, or get insurance appropriate for your line of work. That's likely to be state-by-state. You just get the convenience of an EIN by registering and some additional legal protections by being a distinct entity (i.e. I could sell the company or assign IP to it or hire employees).

I have certainly gotten contractor income to me personally that I just had to account for. In the USA for small businesses you'd have to send the same documentation, so it doesn't even save paperwork. As a sole proprietorship I get the same tax documents from my clients as I would if I were operating directly under my name.

Edit: Also, if this were true in the USA, it implies that all those Uber drivers each have a sole-proprietorship set up. I'm pretty sure that companies can hire contractors as individuals without them becoming businesses.