The physical assets of the bourgeoisie would be taken by the revolutionary state and collectivized and there would be some kind of tansition to a new currency and obviously the stock market and other means of investment would be dismantled. I have no idea how long that would take exactly. But meanwhile, if they can be taxed, their bank accounts can be emptied just as easily. And they would be. Calling that a tax is really stretching the definition of tax. Taxes are for everyone else.

And this is all assuming they aren't parodied or forced to flee during or shortly after the revolution.

But anyway, that's clearly not what the band is talking about. "Tax the rich" means change the current state's system of taxation to a more progressive one, which is radlib shit, in contrast with the other cool shit they're talking about. They need to expand their imaginations.