Except for the main reason of "all of Biden's donors would leave him." Neoliberal democracy has nothing to do with voters, it has everything to do with fundraisers. If Biden loses his fundraisers to someone else, the voters will follow, because that money will buy the propaganda to move them. This is how neoliberal democracy works. To think otherwise is idealist; it has never worked that way and it never will work that way under the current system.