What did disabled people do before there was social security? What makes them entitled to money from the taxpayers? What enumerated power in the constitution allows for disbursal of taxpayer funds to special interest groups? The politics of need and socialist compassion seems to trump the limits set in the constitution. Part of the answer is that churches and individuals and families cared for the disabled before the iron fist of the government enacted confiscatory income taxes. Before FDR screwed things up, my grandfather was exceptionally generous in tithing and helping needy families in the community. When heavy income taxes stripped him of the disposable income to act in charitable fashion, he ceded that responsibility to the compassionate socialists in the government.
BTW, I see plenty of people labeled "disabled" that are perfectly capable of doing productive work. They talk a doctor into writing them up as disabled so they can qualify for government social programs. Many of these people CAN work, then just WON"T work. Collecting government benefits is so much easier.
I do have some practical experience in the matter as well. My 22 year old son has had 4 open heart surgeries. He has two artificial valves, one banded valve and a pacemaker. He had ADD so bad at age 5 that his kindergarten teacher kicked him out of class on the second day. Last week, he completed his first semester as a geology major at Idaho State University with a 4.0 report card. He's still too inattentive to put into a car on a city street, so my wife and I take turns providing his transportation. Should he be dipping into taxpayer funds just because he can't drive a car or pick up anything heavier than 10 pounds? I don't think so. I expect to attend his graduation in 2 years with a geology degree. Maybe even a minor in paleontology. I expect he will be 25 before he can get a productive job with enough income to be off the nest. He will need to find a job to cover the cost of a PT test every 3 weeks at $40 and Coumedin prescriptions at $70 a pop to keep the stainless steel valves from gumming up.