Thats true, money and enjoyable work environments can coexist.
The second part of my comment is more accurate-its the nature of the business that made it aggressive and it will attract that type of people. They might enjoy being hyper-competitive (ie the stereotypical salesman) and they are greatly awarded for doing so.
Having bean bag chairs and guitar hero might not sound like a fun place to work, to them.
I agreed with the second part of your comment and I know what you mean. I've worked in extremely competitive / aggressive environments and I got a serious buzz from it.
If you can channel that aggressiveness and competitiveness outward (without pissing off the market), then it's much more productive. It's also all too easy to let it cause damage internally.
This culture seems to work well in the enterprise market - Oracle relentlessly beat is competitors and acquired them when they couldn't (Siebel).
Startupers crave freedom and create the opposite culture of their previously unenjoyable jobs.