It’s the proportion of payment vs benefit. We intentionally have a set up where some people pay more into the system than they might get out of it. This isn’t a bug, it’s a feature. But then by the same token some people will be paying an “unfair” amount.

Eg if I make a million a year, I might pay 500k in taxes. Someone making 50k a year might pay 10k. I don’t get an extra 450k a year worth of benefit from my taxes. This is intended and is ok. But I think we should also acknowledge that this happens.