Yup. The Lord only asks for 10%. How can the government legitimately demand more.
However, you are mistaken in saying that having a flat tax would eliminate the need for the IRS. You are apparently unaware of how much of the current tax core relates to nothing more than determining exactly what constitutes 'income'. You'd still need the unconstitutional army of vampires sucking the life-blood out of the country even with a 'flat' tax. You'd also still have the Constitution-busting reporting requirements as well.
What is needed is a flat 10% sales tax. You eliminate all IRS forms for individuals. The vast majority of infrastructure for collecting a sales tax is already in place. Make the tax consumptive, and remove the perverse disincentives for growth and success and you'd see a new golden age in this country.
Yeah, I'm sure the government would come up with a way to make the tax as inefficient and as stifling as possible (see VAT), but it would still be better than what we have.
Not unaware. While I want a national retail sale’s tax and have commented about same before, if Americans insist upon an income tax then a 10% flat tax, no deductions, no exemptions. If you make money on it that is income. No need for the IRS and the obscene tax code designed to protect the elites and punish those that desire to improve their lives. We are on the same page.