I notice in some countries quality of delivery has dropped dramatically, worse reliability and transit times. The UK for example. I talked with a customer who acknowledged my feeling and said the workers were demotivated by the restructuring which seems to last for over a decade.
In The Netherlands, our former national postal service PostNL is treating its workforce in the most egregious ways of all former monopolies.
Consequently I found the Russian postal service to be fast and reliable, especially considering the vast distances serviced.
15 years ago, there was some corruption in Africa, South/Middle America.
Not any more.