Sure Mamare got guts for portraying in his story what is essentially a discussion on Communism
At this point he'll have to make the characters reach a settlement on the issue, which will inevitably show his own political ideas.
Personally I think that at most they could ensure food for everyone (but only the common dishes). Shelters shouldn't be an issue as they should be provided by each guild, illnesses of any kind do not exist for adventurers so medical expenses are zero already. Whatever do adventurers need to simply live in Akiba?
RMT no longer exists so the economy should actually be fairer than what it is in most MMORPGs.