I'm not going to defend bshole's tax plan, because I think it's a bit extreme, but I find this argument to be entirely uncompelling. Why should we care if some rich people decide they'd rather leave than pay to stay in the place that they're fond of calling "the best country on Earth"? What, all the silicon valley billionaires are going to take up residence in Ireland and then realize, shit, we don't have any of our engineers or market over here? The Texas oil magnates are going to leave when their wealth is tied to physical property they own in the United States? All the bankers leave and NO ONE steps up to replace them because we all know there's no money to be made in banking? Movie stars and athletes book it until they realize that their fame and fortune is derived solely from a culture willing to pay exorbitant salaries for entertainment and good luck finding that in a tax-free place like Somalia? A mass exodus of the rich won't happen, and even if it did, we've got hundreds of millions of people; surely SOMEONE is capable of filling those gaps. It's just silly to act like taxing the rich is going to result in them absconding with all the capital they control like Robert Irsay trucking the Colts out of Baltimore in the dead of the night. Especially because even if they leave, they're still going to need to sell their products to someone, and American consumers have all the money. It's a nonsensical argument.