Agreed.
I think his job was to do nothing more than stop Bernie's momentum (which he did well); having a 'crazy' at the top of the ticket would have been disastrous for the Dems in November.
Perhaps Republican Senators were more concerned about how important these workers are to getting the economy rolling again (why go to work when you can get more just sitting home?) than the money but they sound uncaring about low income workers. It made a perfect opening to energize Bernie and his supporters. It will be hard for the Dems to dump both Biden and Bernie