I do find treating people equally under the law undesirable to some degree....
because if we did we wouldn't have welfare at all. Which just feels wrong, espiecally for those born retarded or who are physically disabled.
I think the problem people tend to have is they coflate what's fair with what's moral.
Welfare isn't fair or "just", however it's morale.
It's all a matter of deciding how unfair a society you want and how unfairly you want to treat some people so you can fit what you believe is moral, preferably taking into account things like future economic development when considering this as well, since not only are you usually burdening the present with welfare but the future as well.
It's a tough balancing act on something that's subjective.
To have true equality you can't play favorites with any group or demographic and only allow people to rely on their skills to survive.
