[frostburg]

Their education mostly or totally happened at the expense of other states and the way they're being treated means that they don't get adequate recognition for their work, so yes, exploited.

They can go to work in other, more civilized, western democracies where they're not made to feel unwelcome. Standards of living in the UK aren't that special and these people are there because they're tied to specific research projects, not because it's a great country.