People at the bottom also tend to forget how much they need people at the top. If you were to erase a billionaire like Bill Gates or Larry Ellison or the guys who invented facebook from the history books, you'd also erase all of the jobs and wealth that their creativity had created for society. In addition, society would arguably lose technology or cheap resources that have been great benefit to it.
Let me put it another way, if the boards of GE or IBM or any of these companies that pay their CEOs tens of millions of dollars were looking to replace their CEO, why don't they choose cheap labor over costly labor? Like me. I'll work for only a million a year instead of tens of millions, and I'm sure there are people out there who would work for free as CEO, just to get "CEO, GE" on their resume. Well companies don't hire the cheapest workers because they'd be unqualified -- a CEO who makes 100 million a year should create value for the company of many times that. And looking at the choice of hiring a CEO who will create a billion in value and cost the company 100 million, or me, who will cost only a million but probably destroy value, the company makes the rational choice.
This is not to say that workers are not important. It's a two way street: a fat cat should not be allowed to exploit their workers (slave labor / sweat shops / etc). But to create value for a company and economy you need to pay people for the services they're doing (for lack of a better word, for their minds).
There was another poster somewhere who hit it spot on: the problem with the crisis is not all businessmen, its the ones who created a cesspool of toxic debt and banks ready to crash. Those people are criminals, and should be prosecuted as the con-artists that they are. However, punishing all business for the acts of a few con men will create a reactionary response -- and hurt the irish more then it'll help it