We could just keep using "First world" vs "Third world" as above. There are also multiple NGOs that measure these things and break down the "ratings" into component parts.

On the other hand, an advocate for greatly increased corruption might claim that corruption can't be measured at all. Or, hypothetically, they might strictly use un-anchored non-metrics like "the other guy does it too", "any is too much", "omg look over there!", etc.

https://www.transparency.org/en/cpi/2024 offers some methodologies.