Which is the busiest city in the world?

Mexico City, Mexico is officially the busiest city in the world with a total score of 69.6 out of 100. Already boasting a huge population of 12,294,193 people, the Mexican capital keeps its citizens busy with average working hours of 2,511 hours per year and is one of the highest in the world.

Mexico, you mean there are a lot of job offers?

Jobs in Mexico among others are:
Surgeons / Doctors. Salary Range: from 63,000 MXN to 190,000 MXN.
Judges. Salary Range: from 53,000 MXN to 160,000 MXN.
Lawyers.
Bank Managers.
Chief Executive Officers.
Chief Financial Officers.
Orthodontists.
College Professors.
Mariachi.
Tortilla makers.
Shoe shiners.
Mounted policemen.
Taxi drivers.
Street food vendors.
Organ grinders.
Charros (Mexican cowboys)