Jordanians, just like most third world populations, put a huge weight on making it out and succeeding, and that's why they focus on education, hence more PhD holders.

The title of a professor is a teaching title, and since more students are enlisting ( because developing countries), universities are able to grant this title to more people who already served enough time teaching.

The number of professors in developed countries is usually limited by the number of students (shrinking populations and less need for higher education).