I'd say a large part of the general population would use their wish for monetary creation. 25,000 gp is a lot in D&D setting. Even if you go by the 1 gp a day wage, that's a life of revenue. Instant retirement! (except they won't calculate that if everyone wishes for gold, gold value will drop....) It wouldn't change the lives of most people (once all that gold is circulating) but it will equalize the wealth with those who used it as a store of value.
With regards to the simulacrum chains, I have (for when the party reach, if ever, the level where they can cast Wish) planned a new opponent : the first wizard to ever devise the wish spells used the simulacrum chain to have simulacra in reserve to cast "I wish for BBEG to be restored in the exact same state he was this morning" (in case Wish goes bad) and another to cast "I wish for my Master to be immune for the effect of the stress linked to casting Wish, without any other detrimental effect to him". Until it kinda worked. Then he always has a simulacrum with an active Wish "I wish to know whenever a new spellcaster in the plane gains the ability to cast the wish spell, along with his identity and current location". And alpha-striking competition if he feels they can't be turned into followers. Using armies of simulacra to sustain concentration on defensive buffs.
Party, meet a 3.5 wizard and die.