And why, exactly, do you think any of those rich individuals and corporations would remain in America, when you're forcing them to work just so you can steal their money and give it to the people who don't?
The US would still be a very lucrative market - especially since everyone would have a minimum income they are able to spend. Say we put taxes at a ridiculous 90%. Would you as a corporation rather take in 10% of $1 billion or 0% of $1 billion. Take your time on the math.
Any third party JavaScript, however, is quite often pretty close to spyware/malware,
Many sites use third-party javascript libraries such as jquery or will host javascript files on a CDN. That doesn't make them close to malware.
The one day you'd sell your soul for something, souls are a glut.