A Leftist? How so? He’s a Capitalist with megalomaniac tendencies. I’d expound further, but it’d be a spoiler.
My source is directly from the graphic novel where it is explicitly stated that he (the bad guy) is a leftist and that the other heroes are right-wingers.
Being wealthy doesn't exclude one from being a leftist. It's all about control and centralization. The leftist elites are all wealthy. What they're interested in is control. That comes from centralization. They're the ones who think 'the little people' can't think for themselves and need the enlightened ones to guide them.