City councillor Karen Davis, working at the NR2 foodbank.
- Credit: Karen Davis
Among those to have signed it is Karen Davis, a Norwich city councillor who also runs the NR2 Foodbank in Norwich.
She said the "most obvious" thing the chancellor could do to address the challenges was to retain the £20 uplift of Universal Credit - worth more than £1,000 per year for anybody claiming it.
And she added that unless more support was given to the retail and hospitality industries, more and more people ran the risk of needing to use the benefits system.
She said: "So many young people are now out of work and it is these people that are disproportionately affected by these industries suffering - as, generally, it is younger people who work in them.