OK, so you think it's all about immigration.
Let's pretend that we could solve the housing crisis overnight by sending the 800,000 immigrants back to wherever they came from.
Once they have gone, how is the NHS going to function without all the overseas doctors and nurses that it currently employs? Or even if you want to privatise healthcare, how are the private hospitals going to function without staff?
How are we going to manage social care for our ageing population without all of the overseas staff? Who is going to look after all of the people who need care?
How are we going to fund our universities once the international student fees can no longer be used to subsidise home students?
How are our businesses going to compete globally without being able to hire the talent that they need to deliver on their objectives?
How are we going to replace the lost tax take when all of the immigrants leave? Are we going to whack up taxes on those who are left or drastically cut public services?
I'm really curious as to how things would work in your utopian vision of a world without immigrants. If your response is that we would train more British workers to take up skilled jobs in medicine, business etc, how do you propose we manage in the interim while we are getting all this into place? How will we afford to pay the wages that are high enough to tempt people into these positions? And how are the universities going to train more medics etc if they're on their knees because of the loss of international student income?