golden handcuffs
noun /ˌɡəʊldən ˈhændkʌfs/
/ˌɡəʊldən ˈhændkʌfs/
[plural] (informal)- a large sum of money and other financial benefits that are given to somebody to persuade them to continue working for a company rather than leaving to work for another company
- He has just signed a £2m golden handcuffs deal with the TV network.