https://en.wikipedia.org/wiki/Gregory_v._Helvering
Government doesn't exist to collect taxes. They are there to provide governance. Taxes are a necessary evil that should be kept to a minimum to provide the service of governance.
If someone can come up with a legal operational structure that gets around taxes then that the government didn't do its job.
It's only easy to get around taxes when the taxes aren't closely tied to the service the government is providing. i.e. when you taxing one individual or business for a service provided to other individuals or businesses.