Keekaboo, I don't understand your obvious resentment. If somebody is entitled to attendance allowance, why does it matter where they live? The benefit system isn't fair - and never has been.
Still, it's a good system, nonetheless - and a lifeline for some. The idea is that we contribute what we can afford, while living and/or working in the UK. Those in need have support, a safety net.
Some of us contribute an awful lot, then never need that support, due to lots of good luck and hard work. I never have resented that.
A friend of mine has never worked and always lived on benefits. Why? She isn't selfish or lazy - but has learning disabilities and poor physical health - so really bad luck and (unemployable) no hard work. I'm glad to pay into the funds that support her - she's just a lovely person!