It's just heartbreaking isn't it.
The idea that families can't eat for fuck's sake. Worse, that fact that it's not surprising.
I had a hairy couple of months between H and I separating and me going back to work but I always managed. I'm very lucky in that the benefits system is working for me. I'm not living the high-life by any means but we certainly have enough to live on day-to-day.
The scary part is that it really is day-to-day. There's nothing in reserve so one unexpected expense and it really is easy to see how things could spiral.
The worst part is people's attitude. We had this on a previous thread about food banks. The OP was genuinely shocked that they existed and couldn't believe how bad the situation is getting.
It was a great thread to start with, lots of people genuinely wanting to learn more, sadly it wasn't long before it was completely derailed by those who think that people are only poor because they're stupid.
We all need defense mechanisms of course but there were several posters who were utterly convinced that people who can't afford food are in that situation because of previous bad decisions.
It's bad enough that this level of poverty is right outside everyone's door but worse that some refuse to see it.
Sorry, rant over 
In response to the OP, if someone volunteers at a food bank they can whinge all they bloody well like! At least they're turning off the TV and doing something about it!
(also I can't imagine how lovely it must feel to have a treat like an iced bun etc when you live off the most basic of rations every single day. It may seem like a small thing but really it isn't)