Umm, sorry, but that's EXACTLY what some liberals here have proposed. Go read the liberal replies in my thread The Rich Are *Not* Paying Their Fair Share? The Facts Say Otherwise and see with your own eyes.
Yes, if you only use about every 3rd word and leave out the rest. This is another case of either selective reading or just plain making shit up. I suggest you read up on the Marginal Tax Rate that went by the way in the early 1980s. It was created in 1935 and taxed on amounts only when a ceiling was reached. For instance, in 1935, that amount was 75% at 250,000. Anything less than that was the normal taxation. Today, that amount would be adjusted to 3.4 million. What has been proposed is to put the Marginal Tax Rate at 10 million and 70%.
In 1935, only one person actually paid the Marginal Tax Rate. Just one. It's not before adjusted income, it's after adjusted income. How do you think the rich get by by paying either ridiculously low percentages or no tax at all on their income? In the 2008 Presidential Election, Obama paid 18% for the year before while Romney paid 12%. I paid about 26% myself and so did most Americans on the average. Romney had millions in income that year yet he paid very little tax. But I have to give it to him, at least he reported much of it. Most of the super rich figure out ways to pay nothing. So who, exactly, will pay that Marginal Tax Rate? No one unless they clean the tax system up which they need to do. But won't because the biggest cheaters are the ones that write the laws.