A little birdy said

that a certain large US bank that has received US taxpayer funds and which has operations in Japan has of its own initiative set caps on the salaries of certain higher level managers/executives. Many of these folk feel that their expertise is not being properly rewarded and so they are moving to some European banks that are offering more bucks. They can then perform miracles for Europe and European taxpayers too.

The little birdy is usually quite accurate on bank/finance-related topics.