Fair can have two meanings, one being justice and the other equal. An equal society is exactly what is sounds like when everyone is equal in everything from rights to money to clothes. A just society is one where everyone gets what they deserve. If you work hard you get money. If you have good habits you will be healthy.
I'd love to live in a just society, but it's very hard to achieve. People built the world this way because they like to be above others, they like the ladders of society and want them to exist. It's possible, but would require a complete reset, like a nuclear war.
An equal society is also a myth, but this one is much worse than a just society. This one, contrary to just society, is completely unsustainable. You can't have equality as long as people are different. You have smart and dumb people, strong and weak. You can't put them all on the same level and make them ignore those features that make them unique.