fat cat
US /ˈfæt ˌkæt/
UK /ˈfæt ˌkæt/
1.
a wealthy and powerful person, especially one who is seen as greedy or corrupt
:
•
The public is tired of seeing corporate fat cats get richer while ordinary people struggle.
•
He was criticized for being a political fat cat, disconnected from the needs of his constituents.