The mob decides they want more money from their government.
They elect the Socialist candidate and expect that all of the money he wants to tax will actually stick around to be taxed.
Meanwhile, the "rich" don't want to play anymore. They are taking their ball and leaving. This is what the "tax the rich" attitude leads to. Less entrepeneurs. Less jobs. Smaller tax base. Socialism really only works along with a militaristic dictatorship to hold the producers hostage. I wonder when that will happen now that the "rich" are looking to run.