small detail: if pubs ran a bitcoin or ethereum node (they could mention they expose a cryptocurrentcy api in their pub-annnouncement) then you don't need the chain explorer website, also it can broadcast transactions for you.

secondly, money: the interface between scarcity and abundance is chaos. That's not gonna not happen just because we turn inward - but doing so will limit the impact that ssb can have. Personally, I want ssb to have a big impact - and I am very happy to see people exploring ideas like MMT on ssb.