He has found a way to eat his cake and still have it.
Can't eat your cake and have it, his father thought.
A. This is a chance to eat your cake and have it, too.
It's sort of like being able to eat your cake and diet too.
Let them eat cake, because men don't really mind if you look like the side of a barn.
And no we won't even get to "eat cake" as they'll keep it all for themselves.
"And do you think he'd mind if we eat his cake?"
"You can only eat so much white cake, my friend."
In other words, the money manager ends up eating his cake and having it, too.
But there is a point at which you cannot eat your cake and have it, too.