There is a saying "The strongest horse gets whipped the hardest", the object of the phrase should give away how long people have known this.
So which is it?
He specifically used the "Squeaky wheel gets the oil" metaphor to describe what he'd done and why it worked.
The "oil" is money.
Somebody who makes trouble and gets noticed for it.
> gets the oil
Is subjected to 'corrective measures.'
It's another way of saying the nail that sticks out gets hammered down.