I think it’s a deeper disillusionment with the economy. Anyone who isn’t truly rich is coming to the conclusion that it’s becoming increasingly hard to get ahead in the economy over the long term, and the measures they use for economic health are becoming increasingly divorced from this reality. Things getting mildly better for some people over the recent past don’t offset people’s economic realities.
I’ve been there, it’s pretty crazy. There are a bunch of anti-government rants in front of the entrance that you can’t see from this picture, so this place has a pretty weird vibe.