It's hard to see what Wall St types actually contribute to the economy.It's really unfortunate that people see things this way.
Somehow, the fact that I can -- in seconds -- convert money I earned at my job into a stake in one of thousands of businesses, many of them operating in multiple countries and offering multiple product lines (and the fact that the cost of converting my dollars into this stake costs less than, well, a good steak) is incredible. It's jaw-dropping.
It's stunning that someone in Florida can live off of the profits of mines in Madagascar, fast-food restaurants in California, steel mills in South Korea, and insurance companies in Connecticut, all without spending more than half an hour a week reading brokerage statements.
It's astounding that an entrepreneur can take a business whose future profits can't be estimated to within an order of magnitude, and sell a portion of that business for a specific amount.
Finance is an incredibly valuable industry. Getting even some of this stuff slightly right creates a lot of wealth, and helps other industries create a lot more wealth. There have been excesses and there has been incompetence, but that doesn't change the fact that finance, in the aggregate, has been very beneficial.