To be blunt, I want to see the income tax abolished and the 16th Amendment repealed. I want to see everybody at the IRS get a real job that produces something other than thousand-page rulebooks, suffering, and headaches for Americans.
Think it's impossible? Then take a minute to ask yourself what your favorite federal programs are. I've asked many people, and the best answers I've gotten are social security, unemployment, and the 401k program. But then I ask, are these programs (which are a few among many hundreds that I'm sure you could do without) worth the income tax you will pay over your whole lifetime? The answer to that question also answers whether the country could function without the federal income tax. It most certainly could, as it did for over a century of its existence- and so could you, if you were permitted to keep your money instead of forfeiting it to Washington.
The reason the American government wouldn't crumble without the income tax is because it would be so small- small enough to fit within the confines delineated by the Constitution. It could easily be funded by a flat tax on all imports, because its job would be dramatically reduced from its current levels.
Any proposed alternative to the current tax system (besides a flat 0% tax) is doomed to eventually mutate out of control, just like every other new government proposal. Anything less than dramatic cuts in funding, accompanied by dramatic cuts in government is not worth our time. So long as we have an income tax, you and I will never be free.