The state still gives people enough to eat each week, plus housing benefit, not having to pay council tax
Universal credit payments.
£317.82 - standard allowance
£277.08 - Support for 1 child
These are typical monthly payments before housing element.
Ignore rent for moment and it's about £595 to pay gas, electric, council tax, insurance, TV license, internet as it's a necessity for Universal Credit, travelling expenses for visiting job centre weekly, food and any other bills that crop up.
With housing element it depends on lots of variables but as an example:
Single claimant aged under 25: £251.77 per month.
Single claimant aged 25 or over: £317.82 per month.
Joint claimants both aged under 25: £395.20 per month.
Joint claimants either aged 25 or over: £498.89 per month
Which as you can see is way, way, way below typical rents.
So from that £595 that's used as already listed you may have to use a portion of it to make up rental shortfall.
So a quick example:
Mum aged 30 with a 7 year old.
Gets the £595 as above + £317 housing + £80 a month CB.
Call it a square £1000 a month
Rent on her 2 bed is £500
£500 left
Council tax contribution £50
Gas £50
Electric £50
Internet £40
Food £100
TV license £10
Only £200 left already before travelling expenses, insurance, stuff for child, etc etc.
I can see how people end up at food banks, imagine your child needing new shoes or specific uniform items from specific shops etc.
It doesn't work out much better for people working low paid jobs either. Universal credit goes down the more you earn so she could earn £600 a month and only be £200 better off which will be eaten with child care fees which she must pay out of her pocket and claim back from Universal Credit at 85%