Interestingly, some of the learning disabled adults I support told me back in 2015, that they voted for the Tories because they were told wrongfully by their parents that they had to vote for them because if they voted for Labour or others they would lose their benefits
[anger]
Having spoken to my dbro about this, he told me that when he worked at a residential college, every student was given a polling card in the last GE and the students who don't have the capacity to understand (non-verbal etc) were "helped" by the staff to vote. My dbro said he felt it wasn't right as he would be using his own political beliefs to influence their vote.
Between us, we've met some support staff who have been quite bitter about disabled people on benefits and always begrudge them, so I wouldn't have been surprised if some of them supporting had deliberately put a cross next to the Tories for those students who lacked capacity.
Certainly during my time in Supported Living from the ages of 20-24, I was looked down on for wanting to better myself by the staff, e.g. I would come home from work and find a member of staff and a couple of his favourites in the car park making pointed digs at me. It was almost as if working made the support staff's jobs harder. And when my job ended, I was told by my keyworker that "Employers won't hire disabled people but you've got your benefits, you've managed on those before and you will again."
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And another thing before I jump off my soapbox - my local college gives discounts on college courses to those on HB - so what will happen to those aged 19-21 who are trying to make a better life for themselves and now they have to pay full price for their college courses out of their benefits. I'm pretty sure some will end up dropping out as they will no longer afford to go to college so that will mean more young futures wasted.