a heelers riding by

The Tearman cafe, Main Street, Ireland.
Me holding forth about matters political to Ron Baines.
With measured tread I am elucidating various perspectives on a meeting held by businessman Donald Trump Junior with a Russian woman six months before the American Presidential elections which last year returned Don Junior's father to high office.
"We had an old saying back in the Revenue Commissioners," I murmur sagely, "Cui bono."
"I never knew you worked in the Revenue Commissioners," says ye Baines du jour. "You? You of all people. You were a tax man?"
"There's lots of things you don't know about me. Try to stay on the subject."
"Okay, okay. What does the saying mean?"
"Cui Bono... It means: Cootchy Cootchy Coo Bono, we're going to take all your money in frivolous taxation and spend it on our ridiculous salaries and pay rises."