This is my view. I pay all the various taxes so the state should also meet their obligations and feel donating to food banks is paying twice, certainly for essential items. Adding something they can hand out as treat e.g. Easter Egg is different.
Unfortunately the State does not appear to wish to meet its obligations at present nor for some time proceeding today's cost of living crisis.
Let's take a simple case a single person aged 25 with no children nor disabilities renting a private property and liable for Band A for their Council Tax. In 2010 they would have been entitled to income based Jobseekers Allowance worth £67.50 per week. They would have been able to get Council Tax Benefit which would cover 100% of their Council Tax bill. Their Housing Benefit been based on the Local Housing Allowance rate of one bedroom and would have been based on the median of rents (or the 50th percentile) in their local area.
Fast forward to 2022. A single person aged 25 with no children or disabilities renting a private property in Band A is now (or will be from April 2022 as I'm comparing with the April 2010 figure) entitled to Universal Credit of £77.28 per week. They now will get Council Tax Support which will be capped to something likely between 75% and 85% of their liability (the amount covered varies by Local Authority as they now set their own schemes and receive less from Central Government cover the cost of their scheme) so is probably paying somewhere in the region of £3 per week (depending on the exactly value of Band A, that also varies) in Council Tax. The Housing Costs Element of their Universal Credit will be calculated at the Shared Room Rate rather than the One Bedroom rate as anyone under-35 that has no dependent children or is single only gets that lower rate, it also now based on the 30th percentile or the bottom 30% of the rental market in their local area.
So the Universal Credit of 2022 has increased by only £11.58 which is an 14.5% increase in 12 years. The
Bank of England's inflation calculator suggests that £67 in 2010 would be worth £91 in 2021 (it doesn't have 2022 yet) due to inflation in that time. Our person is having to find money to pay for their Council Tax and is also going to almost certainly be contributing to their rent. It's hard to pin down precise figures as I can't find data going back to 2010 before all the cuts came in. But taking 2015 as an example in my area (Teesside) the one bedroom rate was £80.56 per week it is now £86.30 per week. But actually our 25 year old will begetting the Shared Room rate which in 2022 for Teesside is only £65.00 per week. Good luck finding reasonable accommodation for £65 per week. It would be tricky at £86.30 per week I bet but not impossible. But recall even this figure is based on the bottom 30% of the market whereas in 2010 it would have been based on bottom 50% so will still be lower. It's also often now frozen as well anyway so falls further behind even the 30% figure (it used to be updated monthly).
So yes I absolutely agree, the State should be meeting its obligations to people to ensure that we don't need to contribute to foodbanks. But in the last twelve years the basic rate of our subsistence benefits have increased by just 14.5% and the Government has made further changes that mean that people have to meet more and more costs from the limited money that they receive. And now they're being asked to pay for more expensive food, more expensive utilities, rents are increasing further, etc etc. So from my point of view the State is absolutely not meeting its obligations.