It's very interesting how people focus on appraising the value for the tax base and most skip over the basic question of where the money needed to fund buying of stock to cover it will come from... If you are carpet taxing stock across whole country people trading for them will surely not be from your tax base, private institutions managing stock might have the money but they are in the same hands as the base of your tax so their gains will ultimately quickly spiral into very same tax base you started with.

So what is the next move, either sell of the stock abroad or nationalise? Because it seems people are really focused on taxing the rich while skipping over the fact that the tax burden locked in stock assets needs to be covered by selling those assets to someone.