I want to mention a number of economic studies that have been done on accessibility, and the costs of accessibility.
It's a myth that it will cost more in the long term; it actually costs less in the long term.
In comparing services that were designed for everyone, versus services where you have the service designed for the average group and then a separate segregated...or afterthought with respect to disability, what you find is that if you include people with disabilities right at the beginning in developing a service, it may cost a little more and take a bit more time initially, but over a five-year period, it will cost less. That's because a service that isn't designed for people with disabilities in mind will continuously have additional issues or features that need to be added, and it will become unstable, and there will be an end of life much more quickly. The long-term costs of that are far more.
There is also this notion of full social costing. I would refer you to a study that was done by the Martin Prosperity Institute called “Releasing Constraints”, which shows that in fact there are many GDP gains to be made, and other economic gains.