money machine
Noun
Meaning
A very profitable scheme or institution, sometimes (derogatory) one that disregards aesthetic or spiritual concerns in favour of making money.
(New Zealand) An automated teller machine.
Source: en.wiktionary.orgSynonyms
Examples
An actress is not a machine, but they treat you like a machine. A money machine.
Television was supposed to be a national park. Instead it has become a money machine. It's a commodity now, just like pork bellies.