Well, yeah, except it’s in direct proportion! A fancier coffin might hold up better under burial conditions, whereas a plain pine box would rot away and return its occupant to the earth a lot faster :D.
We had a very low-key wedding (magistrate, and a lunch afterward), 4 weeks after my brother married in a fairly large deal. I doubt it was the 1983 equivalent of 100,000, but there was a big rehearsal dinner, and a big country-club reception afterward. Also church-sanctioned (ours was not).
We are still married. They are not.
The movie “Father of the Bride” (the original) showed some excesses but was not too awful. The remake, with Steve Martin, showed the bride going really, really crazy for ridiculous stuff, and the father getting conned into permitting it because she (or the wife) batted their eyes and looked teary. We couldn’t even watch the whole thing.