feather your own nest
US /ˈfɛðər jʊər oʊn nɛst/
UK /ˈfɛðər jʊər oʊn nɛst/

1.
enriquecerse a sí mismo, aprovecharse de su posición
to use your position or job to get money or other advantages for yourself, especially in a dishonest or unfair way
:
•
The politician was accused of feathering his own nest by awarding contracts to his friends.
El político fue acusado de enriquecerse a sí mismo al otorgar contratos a sus amigos.
•
She was fired for trying to feather her own nest at the company's expense.
Fue despedida por intentar enriquecerse a sí misma a expensas de la empresa.