YSK The difference between equality, justice and equity.
Why YSK: because what seems like equal situation from surface isn't always equal opportunity for all. And even when equal measure of help is provided, it might not be equally useful.
It's not so much NEVER improving things so much as not letting the quest for perfection get in the way of steps in the right direction.
If a fictional city went from a mediocre tuition based college to a fantastic one that was free to students that live in the city, previous students might wish their schooling was free when they were there. It isn't fair. But it's also a big improvement for the future and worth doing.