Like other workers in Dubai, Emirates' employees do not pay income tax, which means that grosssalaries can be much lower than at European and American rivals.
The second is that Gross has used the wages and salaries share of national income, not the more correct total compensation, or total labour share, of that national income.
It was in the 1970s that free agency came to professional sports and player salaries skyrocketed, in due course becoming a pre-set share of gross revenues of the sport.