I can only speak for myself but I think many people would agree there is a 'sweet spot' which represents the total police per capita with social problems developing as we get away from that ratio. I also think that this number is lower the lower the per-capita GDP of an area.

'defund the police' as I think of it isn't about defunding completely, but recognising that we are way off on the 'too many police per capita' side of the scale, possibly because poor neighborhoods are getting a police presence closer to the 'sweet spot' of rich neighborhoods.