brain drain

"The brain drain will weigh heavily on productivity."

The more who leave, the better, because the brain drain is going to free up a lot of real estate and help solve the housing crisis.

When you get to a Super Bowl, of course the brain drain occurs.

But losing so many experienced people this year created a huge and sudden “brain drain,” he said.

Though many were "nervous", others, such as research organisations, could benefit from a brain drain from the United States - with some researchers not wanting or able to work in the US.