Employers get paid extra (tax breaks, etc.) to hire those with disabilities, does not have to be physical, lots of people with mental disabilities get hired too that way, through government agencies, but the work someone can do with a mental disability often isn't the sort of work needed. If someone cannot show up, cannot "do" anything needing doing because of their disability, they cannot work, generally are too disabled and apply for disability, etc. Employers are not bad guys, a business has to make money or it goes out of business, cannot hire/pay anyone.