golden handcuffs
US /ˈɡoʊldən ˈhændˌkʌfs/
UK /ˈɡoʊldən ˈhændˌkʌfs/

1.
financial incentives and benefits that discourage employees from leaving a company, even if they are unhappy with their job
:
•
Many executives are tied to their companies by golden handcuffs, making it hard for them to leave.
•
The generous stock options acted as golden handcuffs, keeping her at the firm for years.