Lillie- I understand what you are saying. And of course people have to plan for some fluctuations- but it's hard to imagine one could lose 50% of income to such.
And also you plan with the knowledge of the system you live in, surely. No-one could imagine 9 years ago- that the UK would choose to leave the EU- couly you, really? Be fair.
Friends from Scotland had nearly bought a house in France to retire to recently- and are planning on cancelling the purchase and their plans, as it would all be too tight for them now. And another young friend who has gone through the most horrendous family tragedy recently, has just lost the sale of her French house due to Brexit too.
I can see why people in the UK would think 'ah, they chose to move out- so they can lump it now' - green eyed monster and all that- but some circumstances were just impossible to imagine and planned for. We were lucky to be able to keep a small property in the UK, just in case. Lucky too that if we did decide to go back, our currency is so high that the exchange rate would cover all our losses + a bit more hopefully. Very lucky indeed- although in the meantime, Brexit will it us even harder than most. I take full responsibility for our decision.
But if 1000s of expats have to move back to UK, broke and with no savings left and health problems - they will need financial support, expensive health care and housing. The UK won't be able to refuse their return, as UK nationals.