If you lose your job and are in need, you're not going to sell all your clothes for a pittance, let's face it, people use eBay and vinted to get bargains as cheaply as they can, and buy rags to wear to show their status. It's also possible to buy quality clothing at charity shops, all my warm winter coats are good makes from charity shops.
You need phones for so much nowadays, and as many have said you need to be contactable if you're signing on. Back in the old days job clubs would help with stamps for job applications, have you seen the cost of stamps recently? I pay £15 for 60gb data and more or less unlimited calls. I got that when I was working as I needed Internet access when out and about, it's still useful at home and when I'm away. Many don't need so much and can get a cheaper Sim for the cost of a few stamps. Not all who are in need are unemployed, there are a fair few that are on low incomes and work alongside bringing up young children and an unexpected crisis can plunge them into real difficulty, it could be an unexpected car repair that needs paying for so the person can get to a job that starts before buses are running, or to do school pick ups and drop offs and get to work on time, a washing machine breaking down, remember that the few laundrettes around nowadays are expensive ( I would have to drive 12 miles to my nearest laundrette) or a bereavement or suchlike
That 14 year old doesn't know he's born, he doesn't need to pay rent, utilities. I hope he doesn't find himself in a difficult situation one day where he is in need of help
Locally we have a food bank, support from churches and a food hub with a community fridge . The fridge is both for those in need in the community, and to avoid food waste, sometimes supermarkets coming up to sell by food would be skipped if no one took it, surely most of us, as the day goes in would rather it was taken and used by people, even if they can afford not to use it, people can and do make donations to keep it going.
Who would choose to live off random stuff, and not know if there would be enough short dates stuff to make a balanced nutritious meal
As for homeless people charging their phones, nowadays there are more and more places where people can go and keep warm and have a cuppa and charge their phone, libraries included