I've read the part on economics, and it does not seem so revolutionary: people should be content with less; the wealthy should share from their abundance; greed is not good; the State should protect the weak and ignorant from fraud and privation.
Beyond that (and I don't think Evangelii Gaudium goes beyond that), the hierarchs can preach all the social democracy they want. They still can’t re-write economic law.
I don't see where +Francis has condemned central banking and government-sponsored enterprises as appalling moral hazards, nor called out monetary inflation as inter-generational theft and a disincentive to thrift. Is anybody in the Church even thinking along these lines?
Economics, properly understood, is descriptive. We can no more rewrite the laws of economics to assure nobody ever lacks for chemotherapy than we can rewrite the laws of physics to assure nobody ever gets hurt. I thought that was the whole point of Adam's curse.
The poor in the West actually share the sins of the Biblical rich: they are obese, addicted and live debauched lifestyles. Elsewhere, Western foreign aid enables the Third World literally to breed itself into a Malthusian apocalypse.
Steve Sailer likes to point out how the handwringing over "racism" is about 100 years backward-looking, with cruel WASP overlords brutalizing their servile African workforce. Nobody thinks too hard about anything more current, like the fact that Mexicans evict black Americans from their neighborhoods (and their labor pools), or that Sunnis and Shias want to rip each others' heads off. Similarly, a lot of churchmen seem to be worrying over Victorian-era chimney sweeps or Medieval European serfs, instead of the entitled, TV-watching, bling-wearing, resentful reality.
What's way closer to the truth is that the Rich and the Poor are both parasitic. The middle class is the one that needs protecting.