Those on disability with indesputable severe conditions/illness (amputees, genetic disorders, mulitiple sclerosis/wheelchair bound etc) should be looked after and those malingerers who fake bad backs/depression/etc etc should be weeded out and forced into work.
A chap in our local, is in a wheelchair as he had both legs amputated some years ago. He was recently deemed " fit for work." He phoned them when the letter telling him he was fit for work came through and asked how disabled he had to be. .. Their answer?? "Well, you could have prosthetic limbs fitted which would allow you to walk, then you could get an easy job."
Years ago , I used to help look after a blind, old lady. She was being assessed for carers allowance. A young person arrived from Social Security (as was) to conduct the assessment. First thing was could she make a cup of tea without help?.
This lady managed to get into the kitchen, boil the kettle (overfilled) fill the cup with boiling water (again overfilled), put milk into a cup of tea that was already spilling all over the place,,, and finally managed to produce a cup of tea.

(there was a lot of prompting from the person doing the assessment too)
She was asked if she could go to the toilet on her own, go to bed on her own, etc.
She failed the assessment for carers allowance because she could do these things (in a fashion) Even though she couldn't go out of the front door without help. Without a carer, she was effectively trapped in her own home, yet Social Security deemed, she didn't need a carer she would have to pay for. She had no savings to speak of and depended upon relatives for a majority of her care. Simply because she had these relatives, SS reckoned she didn't warrant any payments for a full time carer, therefore putting the burden of care on to relatives.