There's a really classic cliche every time you switch the TV on - you see cops arguing. I have spent a day a week for many years in the presence of police and I have never seen them argue. It's a military hierarchy. They do what they're told. There's no bickering.
I think 'Tap Dogs' has lasted so long because people have a natural interest in tap dancing. This form of dancing can't be dated, it's such an intriguing form of dance because the feet are also an an instrument.