A piece of the pie is your fair share of the money or benefits. Want a piece of the pie, get a piece of the pie, a bigger piece of the pie.
The picture assumes the total is fixed, so one share can only grow at another's expense. It is used most in writing about profits and contracts.
1phrasea piece of the pieYour fair share of the money or benefits.
“Every supplier wanted a piece of the pie once the contract was announced.”
a piece of the pie is a phrase.
Also accepted in games: piece of the pie, slice of the pie
Practised in Idioms