That is, if they're successful.
Who knows. I think it's better to err on the side of optimism despite the grim outlook.
Why would someone want to collect promises? That seems rather silly, right? What having a lot of promises gives you is social standing. People treat you differently — better — when they give you their promises. If traditional labor goes away, the economy simply becomes you promising to hold those who have things in the highest regard; to be there as their friend when they call for you to. That is the same modern economy we already have but with less steps.