Goldmans has its share of top programmers and, like any company, is keen to retain them. One of these people made contributing to Open Source a major goal for last year.
Well done to him, and well done to GS for supporting him. The company (rightly) gets a ton of bad press, but that doesn't mean it can't do good things as well.
Disclaimer: I'm an ex GS employee, but have nothing to gain.