Central government cut money that goes to local authorities to provide services. They don't have enough money.
The PIP assessment process is DREADFUL. DLA for adults changed to PIP in 2013 and people who had life long conditions like the man in the video who was most probably on a lifetime award as his condition wont improve, were asked to reapply under PIP. The PIP forms are horrific for a start but once they are filed, you are called for an assessment. These people do the assessments in building that inaccessible to people with physical disabilities. There is no disabled parking, steps into buildings, no lifts. Wrt those with autism and LDs, they make you wait a long time. They call people for assessment who receive care off local authorities or go to special schools and colleges. That is how ridiculous it is. They have cut benefits off those that were most vulnerable. PIP is not a benefit to help people into work.
The disability news service is good to read with respect to this.