(1) Number 1 tax on the middle class: Inflation and Quantitative Easing. Over the past five years the actual purchasing power of your earnings have been significantly reduced, at a faster rate than what normally occurs for inflation. We've been through several rounds of Quantitative Easing, dramatic increases in inflation meant to artificially reduce reverberations in the economy from the latest crises. It is really a hidden tax that allows the government to pay for things by taking the value from your dollars, rather than your actual dollars. 
This hidden tax not only affects the value of what you earn, but the value of everything that you've saved. It taxes the money you made years ago in addition to the money you're making now. And it affects rich and poor (hurts the poor the most).
You've been taxed a great deal over the last five years, and you probably don't even know it, because you forget that the dollar amounts in your bank statement don't mean what they used to mean a few years ago. And while these taxes were a sort of flat tax, it wasn't levied by your Representatives and it didn't necessarily have your best interests at heart; and if this is cronyism, it sure hasn't gotten a lot of attention. Why all your Democrat Representatives would have to do to fire you up about it is simply call it "crony capitalism." But they haven't and you probably aren't. The Occupiers will just have to occupy because the corporations are being all "corporationey."
(2) Not quite a tax but reduces your ability to buy: Restricted oil production inflates gas prices and dramatically increases the price of nearly everything, since gas allows farms to be farmed and allows food and merchandise to be transported everywhere. The energy need to produce and transport contributes to the price. Decisions to prefer other nations (such as to develop their offshore oil rather than developing our own resources.
