Sure, I'd hire an anti-capitalist to run an investment firm provided they're otherwise qualified. The fact that they're anti-capitalist would suggest they've probably examined the relevant ideological issues and would likely be very objective. And they'd likely inject an ethical perspective that would serve an employer's interests. Looking at a similar issue from a different perspective, corporations and the police hire hackers to fight cyber crime. Who else, after all, better understands IT security vulnerabilities? Having people with ideologically contrarian views within an organization can be an advantage rather than a disadvantage.