Hmm. I'm disabled. Very, by any measure (autism, cancer, faceblind, dyspraxic, spinal scoliosis, arthritis) and the last time I looked, my company that I co-own had paid just under £1million in taxes and VAT over the last couple of years. That pays for quite a few benefit packages, I think.
Amongst my other disabled friends and acquaintances, I can count a senior social worker, the head of a charity, several Vicars, one Bishop, several accountants and surveyors and lawyers, a top scientist, ...shall I go on? The notion that disabled people sit around being a drain on society and claiming benefit for nothing is utterly wrong. There are some people who genuinely cannot work or cannot find work (because employers won't hire them), but the idea that we're charity cases for society to fund is quite mistaken.
And good points about the amount we contribute to charities, to community, to family etc too.