Question

to put your money where your mouth is - If the government is really serious about improving our schools, it needs to put its money where its mouth is.  - With him it's all just talk. He never puts his money where his mouth is.

Accepted Answer

to not just talk about what is right but also to do something about it (usually by spending money)

Idiom	to put your money where your mouth is
Definition	to not just talk about what is right but also to do something about it (usually by spending money)
Examples	- If the government is really serious about improving our schools, it needs to put its money where its mouth is. - With him it's all just talk. He never puts his money where his mouth is.

Money Mouth Put Talk Spending Government Improving Schools