No one on benefits such as ESA can risk getting involved in politics, they would have their benefits stopped.
This is completely untrue, esa allows claimants to work a certain number of hours a week paid or unpaid. In fact, it's very common in my experience for councillors to have themselves or care for someone with a disability.
Lone parents have trouble with the time commitment, expense, and things like childcare costs.
That's true, but a lot of council meetings are either in the day when children may be at school/nursery or in the evenings. It's also worth asking your local council whether they have thought about this and whether any accommodations could be made.
Also neither of these things apply to people who aren't disabled or single parents - which is most of the population.
Honestly, apply, apply, apply.
It's the most frustrating thing to see people slag councils off and suggest ridiculous ways to 'show them' like spoiling ballots or vote for ridiculous candidates when the thing that actually makes a difference is being in the council meetings talking tk councillors.
Most people are able to do this if they really want to.