Amy Said:

Why are USA universities more generous to int'l students than UK universities?

We Answered:

I agree. In the UK the financial priorities have shifted so that there is a local rate (supported partly by national government), an EU rate (a little higher again) and the International rate which has gone through the roof but scholarships haven't risen much to match. The last two groups are often competing for the same scholarships, and the truth is there's always someone who is willing to pay for their place from abroad. So nowadays, foreign scholarships are often a token, like the domestic ones.
It didn't matter so much when a lot of the costs were covered automatically, which is becoming less and less true.
Your best bet for a full scholarship is through a local company or government body in your own country who will then require you to work for them (and in theory your country) for a number of years on your return.