Americans are angry at Wall Street, and rightly so. First the financial industry plunged us into economic crisis, then it was bailed out at taxpayer expense. And now, with the economy still deeply depressed, the industry is paying itself gigantic bonuses. If you aren’t outraged, you haven’t been paying attention.

But crashing the economy and fleecing the taxpayer aren’t Wall Street’s only sins. Even before the crisis and the bailouts, many financial-industry high-fliers made fortunes through activities that were worthless if not destructive from a social point of view.

And they’re still at it. Consider two recent news stories.

One involves the rise of high-speed trading: some institutions, including Goldman Sachs, have been using superfast computers to get the jump on other investors, buying or selling stocks a tiny fraction of a second before anyone else can react. Profits from high-frequency trading are one reason Goldman is earning record profits and likely to pay record bonuses.

On a seemingly different front, Sunday’s Times reported on the case of Andrew J. Hall, who leads an arm of Citigroup that speculates on oil and other commodities. His operation has made a lot of money recently, and according to his contract Mr. Hall is owed $100 million.