High incarceration rates most often indicate that governments are only in power by threatening their people or spreading fear. On top of that you see a (most likely) strong effect / high prisoner numbers created by the "commercialization" of putting people into prison - countries where prisons are run as a business.
Guaranteed prisoner numbers or occupancy levels agreed in such contracts (another demonstration that business ethics don't exist anymore) strongly contribute to high numbers and IMHO also express that governments in countries were such contracts / approaches are allowed have completely lost touch to their population.
In developed countries there are two diametrically opposite examples to where governments are trending towards in the moment:
The UK currently considering to play catch-up with the US by also privatizing prison "services" and guaranteeing inmate numbers / occupancy levels.
On the other side Sweden that just recently closed 4 prisons because they were not needed anymore.