One of the questions I would ask is do we really want it? I agree 100% that I find it very difficult to quantify that.
As I mentioned, with the people I know and am working with, we have the potential to lose great citizens. One young man I'm trying to help has a master's degree in engineering, a bachelor's degree in engineering. He's willing to cover the cost of his brother, but he may.... This is the part that some people don't understand. People who are trying to sponsor some of their family members, based on religious and cultural beliefs, may have to leave. That's a possibility.
I like your question and the concept of investment, in looking at persons with disabilities, and their families as well, as contributing, not taking away from....