we used to work in a strip club together
Disabled women often end up prostituted or otherwise in the sex industry. A combination of being easier to manipulate and the promised (see also: pimps' and club owners' lies) hourly rate meaning that making a living looks achievable on the very part-time hours that a disabled woman can cope with.
I'm currently in the middle of autistic burnout. Twenty-five years ago, I was occasionally going clubbing. Now, it's an ordeal to leave the house. I was autistic then and am autistic now, it's just that my symptoms have changed. Your former friend may be in the same position.
I've mentioned that there can be up to 13,000 PIP fraudsters before the PIP fraud rate exceeds 0.5% and no longer rounds to 0% as an integer. So you know one by his own admission, and claim to know another despite not being able to know her full circumstances because you've not been friends for six years. So that's two, perhaps three, of the nation's 13,000 PIP fraudsters known to someone posting on this thread. Given the number of Mumsnet users, that's not actually surprising.
It's still the case that less than 0.5% of PIP claims are fraudulent.