Again, that is a valid argument, but in my experience in dealing with these issues the reality is much different.
I do quite a bit of social security disability cases and have worked in that area since 2004. The AVERAGE wait time nationwide for a disability case to go to hearing is 2 years. This is after you have already gone a year at the initial (and if a non-protype state recon) level. So three years from the time you APPLY until benefits for the average recipient. To put the stats into even more perspective, about 70-80% of those that go to hearing are approved for Social security benefits. About 70% of those denied appeal. Of all those that apply, about 15% nationwide are approved initially (depends on the state and what SSA is trying to do. Some states have target goals of 40% initial approval but still fall very short at only about 20-25% in reality). In some states, initial approval rate is less then 5%. In those areas you pretty much have to by terminal (and even then its difficult). There are some places in this country were the wait for a hearing is between 3-4 years.
Many of my clients were doing fine prior to the medical issues. By the time some of them get to me (1-2 years into the process) they are on the verge of bankruptcy, losing or already lost their home, and it just gets worse. Savings is being wiped out at extraordinary rates to cover medical bills, pay COBRA, AND replace the lost income. I spend a good chunk of my time counseling clients on downsizing (I do the same thing with my divorce clients as well).
I do get the opportunity to see financials over a period of time with many of my clients. Its very interesting and easy to see what leads people to the situation they are in. For example, we have a number of car manf. around here and the plants are closing/laying off. I have seen the incomes of a number of clients and 3 years ago they were making 2-3 times their salary due to overtime and they had been making that much for years (10+ years for many of them). Now they suddenly lose half their income, but can't downsize due to debt, the housing market crashing (and houses not selling at all) etc..