> The problem is, how do you determine who's disadvantaged?
Money, as it can be used to obtain pretty much all other advantages.
> but when you start to look at it carefully there's all sorts of possible issues. Some families are better at budgeting than others, so a family with lower income might have more money available for the kids than a family with higher income
This is not an inequality that we can (or should) correct for. People who work harder have a natural advantage. It's not right to take that away, as doing so hurts everyone. It was by gaining enough advantages to live lives where people could spend their time studying things like science that we obtained what we have now. We would all be worse off without this.
> It's a lot easier to tell if somebody is from X or Y group than to determine their level of disadvantage and what's necessary to help equalize their opportunities.
I disagree both with the idea that it's easier and the idea that it advances any sort of good for society.