Adding a line item to their property tax bill showing how much is paid into settling lawsuits will not make people think that they should demand more accountability. They will think that it should be harder to take legal action against the police.
I think part of the problem here is that this is usually hidden from visibility (intentionally) by officials because it reflects negatively on them.
It may make the news for a day or two, never get seen by the majority of voters, and get swept away later under the deluge of distraction most "infotainment pretending to be news" provides.
---
Go further and just list all government settlements/court judgements underneath the elected official in charge of the branch responsible.
Still, this idea bears merit for other reasons. Americans routinely underestimate how much money is spent on Social Security, healthcare, and debt payments, and overestimate how much money is spent on education and infrastructure. More clarity into that could help build real political momentum to actually balance the budget.
If citizens had granular voting power (i.e. liquid democracy), this would make more sense. As it stands you get to vote for team red or team blue once in a while and hope that their votes impact that line item you’re concerned about.
And quite frankly even if you're a hard-line rightwinger, the way this administration treats your money is so objectively bad, you have to be brainwashed to deny it.