Sure they're making money particularly from being smart, but would someone be able to explain to me how making money from money contributes to something worthwhile to society? Is it just that they're being that much quicker in smoothing out prices of stuff on the stock market? I'm not being snarky, would just like to know. Another slightly different topic: the trend during the Bush boom years is that the so-called 's…
Then why is that? Why free market beats any other forms? Because it computes prices better than any single intelligence known in this universe and it's possible by massive interaction not just between real demand and supply sides but all the participants who care about price. The group of people who care price the most is traders. Traders are the participants whose job is all about pricing, or balancing between demand and supply. Whether or not it's profitable, it's enormous contribution to the price mechanism of free market.
Actually, all the producers in any kind of markets are essentially traders. Whether it's manufacturing, mining, or agriculture, the profit can be made only from meeting price right, not just from hard working oblivion to real demand and supply. If you broaden the concept of trading in this way, you will realize traders are everywhere and they're important as much as any other kind of physical labors. An Internet start-up is also a trader. It can succeed only in the market where it can make successful trades between its product and the cost of what it produces. That's the essence of trading and we all do it every single day.