In an ideal world, each child should receive equal amounts — and responsible parents should know not to go “all out” on the first if it will impact the later siblings.
But OTOH, adult “children” should be able to understand that sometimes circumstances change and that what was affordable when the older one got married may not be affordable when the younger one gets married. If a parents income changed (for the worse) between one child’s marriage and the next, the younger child should not be making a stink that they did not get what the older one did — and if they do, then perhaps they aren’t mature enough to get married in the first place.
Mature, understanding people don’t put their parents into debt by demanding things they can’t afford — even if it’s what their older siblings got.
The Wolf