How, am I the only capitalist here?
I think people who would be interested in something like Universe Sandbox would skew towards "educated" (not necessarily graduates or whatever but certainly more "learned" people), and that probably correlates to a higher skepticism of capitalism. and then there's the fact that if you live in a capitalist society (and uhh everyone does in the 21st century), you've probably been pretty screwed over by it. doesn't take much to question this universal capitalist orthodoxy.
me personally, I believe capitalism is a good thing for developing nations. if put in place properly (i.e. with enough regulation to protect workers but not scare off multinationals), capitalism in those countries could lead to a rapid expansion of prosperity. it's in the first world where it starts to become problematic.
look at the post-war era in the United States, for example: the 1945-1975 period was one of escalating prosperity across the board. following around the middle of the 1970s, income started to concentrate at the top and stagnated everywhere else. unions went into decline as the right-wing waged war on them, and with them went worker protections and regulations. now we have 150 million people who qualify as either in poverty or on the brink of poverty.
a lot of us probably would think the kind of post-war capitalism, a Keynesian variety, would be okay if somehow you could prevent the extremely wealthy from using that wealth to buy off the system. but you can't. as long as there is a person (or a few people) on top of corporate pyramids, capitalism will always be perverted into something that works against the people. that's why there have been periodic resets here in the USA, most notably the New Deal.
it's not as if socialistic ideas have been perfect or anything, it's just a matter of perspective. some people are okay with the wealthy increasing their share of everything until everybody else has next to nothing. some people really hate that idea. most people are somewhere in the middle.
either there are no good answers or we haven't looked in the right place, but if there are no good answers, we on the left believe we (humanity) can still do better than this. maybe we're wrong, but we've gotta try. a utopia may be impossible but that doesn't mean we have to fall into a dystopia.
/rant