'Science aids economy', David Willetts set to say‏

having a good science and research base can be an attraction to companies coming here and can work to mitigate capital flight in case of tax rises

New York Times reports mass banker exodus unlikely

So apparently capital flight is not so much or as bad as some predict. In part this is because of the infrastructure fundamentals and language, and in part because not everyone is as fleet-footed as they claim.
Interesting