Actually, not that I like to correct Pima (usually, the correct responses are "Yes, Dear", "No, Dear", and "My fault, Dear"), I've purchased beer for the crew chiefs several times. Standard Rule in a fighter squadron -- you cause them extra work because of your stupidity, you buy them a round. Lost an object in the cockpit (Foreign Object Damage (FOD) potential; bad juju); led to having had the ejection seat removed. LOTS of work for that. My punishment? Case of beer, AND being out there with them while they pulled the seat and retrieved the piece of the pen I left behind.
But that's not the only time I've purchased beer for my crew chiefs. They work hard, in the rain or cod or heat, keeping those birds flying. The job is critical, and underappreciated. And nothing says "Thank you, I appreciate you" better for them than just showing up on the line with a case of beer and calling them over to share a cold one and to say, "Thanks for a job well done. You earned this".