Keith if you choose to live abroad you should expect to be treated and behave like those whose country you have chosen to be part of. This applies equally to those who take up permanent residence to work in the UK also.
I understand that child benefits are currently being paid to EU workers for their children that don't even live in the UK and why do we pay heating allowance to pensioners living in places like Spain.
Brexit may be a minefield but it provides an opportunity to sort out many abmnormalities that currently exist in many areas.