This is a film I saw when it first came out, and which I have seen a few more times over the years. It's always enjoyable.
One thing is that the comedy does not take sides: it skewers labor and capitalists equally. Only Sid seems outside the classic struggle, even though he's responsible for it.
Spoiler warning: do not read further if you haven't seen the film
This is a fantasy, though presented fairly plausibly. Ask yourself: could someone support most of his or her weight in a single strand of fabric? It would cut through almost any support.
Also, when cornered in an alley, Sid uses a garbage can cover like a knight's shield. Cute symbolism.
Someday, I'll get this on DVD.