PIP is not an out of work benefit. A person doing a masters degree and managing to travel might only be able to do so because they get PIP. A lot of people on PIP DO work, and are only able to because of PIP.
I have a friend with MS. She uses a mobility scooter to get around when out, and a zimmer frame at home. She has a stair lift. She can't cook at all - she is not physically capable of making a meal. Her son is her carer and he can't work because he is caring for her. She uses her PIP to get a weekly hair wash at a hairdresser.
Up until very recently, she worked. Her PIP meant she could get a car on the motibilty scheme. She needed a big car to get her scooter into. Her car meant she could get to her job.
She loves to travel and up until recently, was going on coach trips and cruises. She has to have assistance when she travels, has to have a bigger room. Some of that costs extra and that is what PIP is for. If her son does not want to go on holiday with her, she has to pay someone to go with her.
PIP is not for essentials. It is for the extra costs that come with disabilities. If my friend was not disabled, she could wash her own hair, prepare and cook her own food, get up her own stairs. She would not have to be paying for help with those things. Her son could have his own job and career and not feel that he has to stay at home with her. He is nearly 40. He has never worked because he has always been her carer.
I know another guy who is highly educated and enjoys trips to Disneyland. He uses a motorised wheelchair, and is on the highest rates of PIP on a 10 year award. His condition will only ever get worse. He also works and can only do so because he gets PIP.