And once everyone is out of work bar the fat cats there’ll be no one to sell anything too and the system will collapse. That’s the downside of thinking in black and whites.
Wrong! To paraphrase you; that’s the downside of thinking of capitalism in non-capitalist terms.
The ‘fat cats’ can live where they want and trade where they want; they do already. Look at the non-doms like Sir Philip Green.
Even if the UK is going to ruin, they can live here, in isolated splendour, protected by fences, gates and guards, never having to use public transport or – for that matter – roads. They are hugely wealthy – they have choice.