Refugees come from many different backgrounds and live in many different circumstances, so I wouldn't like to generalise. But I think refugees from the U.K. would probably be healthier and better fed than those from many other countries.
I write because I have always been curious about what it would feel like to be someone else, in a different situation. Fiction is a wonderful way of exploring that.
If fiction changes things, it's usually because it's a powerful way of exploring social issues. And it helps us to understand people who are different from us.