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.
What specifically the parent was referring to I'm not sure, but that would be why it is consistent to describe a company as both "in compliance with tax law" and also as "using loopholes". If they weren't in compliance with tax law they'd just be breaking the law. No one is accusing the companies of breaking the law, they're accusing the tax system of being biased and corrupt.
Which games don't have edge cases, loopholes, exploits?
Of the games which can be "gamed", are they more or less complex than any given tax code?
Won't protect one guy or a small team in case of legal disputes, it's called piercing the corporate veil. I wonder if the EU has something similar.