I disagree. What services do single people use more of?
Bin collection? Obviously not.
Schools? Nope.
Parks and libraries? Again, no.
Adult social care? It's almost non existent in many local authorities. We can see from threads on here (and I know from several people offline) it's often a major battle to get any help - and often a losing battle.
Single childless/childfree in particular get almost nothing. i.e. lower priority for housing from local authorities, which is particularly harsh seeing as housing is now so expensive that it's hard to find somewhere decent to buy or rent on a single income. Their taxes contribute towards funding our kids, yet if they need help, they struggle to get it.
Also some local authorities don't give full council tax discount to people on benefits. So many of the poorest and most vulnerable - low income pensioners, the disabled, etc, will be even more harmed by scrapping the single person discount.
Single people, both the childless/childfree and single parents, are significantly financially penalised - for something (being single) that often isn't a choice, i e. DV or being widowed.