There is an LGA briefing note on this subject from December 2023 here: https://www.local.gov.uk/about/news/section-114-fear-almost-1-5-council-leaders-and-chief-executives-after-cashless-autumn#:~:text=A%20section%20114(3)%20report,available%20in%20a%20financial%20year.
The next post will provide a link to a House of Commons library briefing note from September 2023 (can't put 2 links in 1 post)
Neither of these authoritative references make any mention of 'compulsory' devolution of higher tier local authority liabilities downwards to town or parish councils. There simply is no 'mechanism' for compulsory delegation so any additional responsibility taken up by a lower tier would have to be an entirely VOLUNTARY action and would - in effect - result in precept rise and double taxation of the poor tax payer.
Since there is no limit on a town or parish precept, this is a dangerous and uncontrolled path towards stealth tax with unlimited ceiling.
Your council must have Cllrs that are either high tax high spend Labour types or they are blissfully unaware of the consequences of what is being sold to them.
Local authorities have legal obligations to provide services - they cannot unilaterally delegate those obligations to a lower tier - the opposite is actually true, the liability shifts UPWARDS rather than downwards...
Sounds like smoke and mirrors from whoever is trying to justify a rise, or a sustained unjustifiable level, of reserve.