All a flat tax would do would be to further increase inequality in society, a trend that is already accelerating, without any help from the tax department. Those that believe in supernatural invisible guiding hands in the marketplace, rewarding only the honest and hard working, and slapping lazy welfare people on the head, are merely living out a fantasy, one strongly promoted by the most affluent, for obvious reasons.
One argument advanced by the flat taxers is that the current system is somehow "punishing success" and "chasing away our entrepreneurs." But this idea is just plain wrong. Top marginal income tax rates were well over 80% in the 1950s and 1960s, the decades of the past century with the highest levels of GDP, income and productivity growth.
A flat tax for fat cats | Canadian Centre for Policy Alternatives
The above discusses Canada, but the issues are the same in the US.
Living in a fantasy only in the sense that we have the expectation that people hold themselves accountable. Which of course you liberals have an extreme aversion to. And historical circumstances may have plaid a small role in the productivity of those decades.
Historical circumstances did indeed play a role. A progressive tax system, and veteran's benefits, and other social programs steming from FDR's New Deal created a middle class with the income sufficient to create demand for products and services, thereby leading to growth and employment. A middle class is key to having a healthy economy, and the flat tax would further erode the middle class, more so than any other group in society. The rich would get a free ticket, and the saved resources would no doubt quickly go to creating more distortions and bubbles in the world's economy. The poor are not going to be able to pay anyway. Impose a ten percent tax on a family making $20,000 a year, and you are going to have riots.
And you are accountable, are you? Perhaps you would like to reproduce here the memos you sent to Goldman Sachs, or Bear Sterns, directing them not to assemble or market any more derivative products a few years ago, as they were going to be catastrophic to the world economy. How about your letter to the corporate lobbyists who insisted on the deregulation of commercial banks, which allowed them to speculate with your savings, when you really just wanted a savings account. Maybe you wrote, and they didn't reply. Gee, being accountable is not as easy as one might guess, is it? Before you turned on your light switch this morning, did you do a survey to see where this power was coming from? If it was coal fired power plants, then what? Phone them and insist on new, cleaner burning equipment, or go without lights? No matter, you probably think global warming is a fantasy anyway.
Much as you might like to think you are a cowboy bern, you are not. You, like everyone else, now belongs to a complex economy, and an interlocking world. The only hope we have of creating a positive, livable world is to take control of the means of power, and direct resources to pro-social projects. If you insist on handing this power to the corporate lobby, then you will be stuck with the divided, unfair, conflict ridden society that we once thought we got ride of.