There's two things going on here, however. It is extremely admirable and testament to your life skills that you can do this, and it would outstanding if more people were able to apply the same motivation and skills to live sustainably. I remember doing weekly shopping with my mum, going round 5 or 6 shops because she knew where the best prices for everything were - probably saving 10% on the weekly bill, and sharing her pride in the fact.
The other side of the coin, however is that there is a substantial part of the UK who spend more like 20-30 quid per day, and enough to make you cry that spend over 20-30 quid per meal. Where one sits on this is political: at one extreme, complete redistribution of wealth regardless of value; at the other, unregulated market-based economy.
I think that food banks represent a signal lurch towards the latter, and it is unacceptable in a civilised country. What leads the UK to having foodbanks is market pay rates being too low. During the 80s, 90s, you could see how this puts more profits in the pockets of business owners and shareholders, and puts a greater burden on taxation, which is critical for the economics of less-well-off households. As if that situation wasn't bad enough we have gone the extra step where taxation can no longer shoulder the burden of underpaying people such that charity takes over. That is morally bankrupt, and the UK should hang its head in shame.
The UK's plutocratic government makes its next play again, slamming anyone who says taxation is the solution, because they know that people who struggle to balance the weekly budget are scared shitless of losing more income to the exchequer. It's a false argument, because the taxation simply needs to be of the rich. By rich I don't even mean "people who may get to the end of their lives and still be in a financial position to pass on their property to the kids", which is quite high up the foodchain. I mean the people who literally can't spend it fast enough - there are a lot, and they can be taxed harder.
They'll leave the country if we ask them to pay a fair tax? Bye-bye!