The massive incarceration rates in the US don't seem to be solving anything, although you don't think they're enough. The US has the highest incarceration rate in the industrialized world yet in your view it is barely incarcerating at all.

If China is too different, look at western Europe. England's incarceration rate is less than one third of the US's. Canada is on sixth of the US's. These countries have lower incarceration rates but less crime.