You're correct in stating that eliminating the IRS is blind hatred for the government. I have a blind hatred for paying more taxes to a government that wastes it's revenue. I wonder if the proponents that make complex tax projections for tax programs like the progressive tax consider the high income tax payers reaction to higher taxes? at any rate we must assume first that the middle class pays too much and the rich pay too little. I agree that I pay too much. I am not rich.
As for the democratic party, I'd like to hear a rational argument either way. Please democrats tell me concretely what do you mean by " the rich" or "fair share". Increasingly these words by the democrats are not used to convey facts they but are used to arouse emotions. The goal of the democrats seems to be to win over a gullible public without clarity as to what they actually mean. What a fair share or progressive tax means is simply more taxes. No matter how high the tax rate is you can simply require more by saying they are not pay their fair shair. I have heard some advocates of higher taxes get real specific. But I don't hear it from the democratic presidential hopefuls.
As for raising taxes on the rich this goes against a mountain of evidence that over many generations means higher tax revenues. People that earn a large sum of cash simply move. They are not going to bend over and take it from the federal gov. Currently there are trillions of American dollars used over seas to create jobs, where taxes are lower. Money can be electronically transferred from country to country. There is nothing inevitable in whether revenues increase when it comes to raising taxes. Do tax revenues increase when tax rates are lower? IDK. But it seems to me if more people are working there's more of a chance to get a piece of their wages. The dems are not about what works, they are about getting elected and if villifying the rich for not paying their fair share works, then they'll keep doing it in 2016.
Fair share is totally subjective, as is the right size of government. There are some answers that are clearly wrong or
silly but many that are reasonable.
Further your opinion on the rich leaving the US leading to lower individual income tax collections is just totally wrong at the level of marginal income at rates in the US. You are right there is a mountain of evidence, but it points the other way for a few reasons:
People are not like corporations. Leaving the US tax system has profound consequences. Such as being limited on the amount of time you can spend in the us and being limited on your use of the us banking system
People, unlike companies, have to pay taxes on overseas income immediately. You don't have the option to leave it offshore.
most developed countries have pretty high tax rates. There aren't a lot of desirable places to go.
Most rich people pay a lot of capital gains, not ordinary income, which are taxed at a lower rate. There are plenty of other tax shelters too.
Rich people can and do move states to lower their tax burden - an option that doesn't exist in other countries where taxation is often only on a national basis
Non citizens still have to pay taxes on us income
You can't simply leave and avoid a giant tax bill. People generally don't have the option to leave because they have a large deferred tax bill that they are avoiding by leaving. Companies do have that. People aren't as global as companies.
In practice, the US could still raise a lot more revenue from rich people if it wanted to. That's not to say they should, but it is to say that part of your post is totally detached from facts. You appear to be mistaking the personal income tax system for the corporate income tax system.