vested interest
US /ˈves.tɪd ˈɪn.trəst/
UK /ˈves.tɪd ˈɪn.trəst/

1.
既得利益, 个人利益
a personal stake or involvement in an undertaking or state of affairs, especially one with an expectation of financial or other gain
:
•
As a shareholder, he has a vested interest in the company's success.
作为股东,他对公司的成功有既得利益。
•
The politician's decision was influenced by his vested interest in the new development project.
这位政治家的决定受到了他在新开发项目中的既得利益的影响。