Why caskets? Is the joke that everybody that likes snap ons is a tool? I'm so confused.

I've only barely looked into toolboxes before, and from what I could tell, snap on had slightly better quality control, but overall a worse product than the alternatives, and the alternatives were a fraction of the cost and the features were comparable too (at least for the type/size I was looking into).

I can't see why they'd be particularly coveted, other than conspicuous consumerism, and I don't understand what that has to do with caskets, is this some kind of reference that I'm not getting?