How much the highest earning world leaders make?

Md. Fakrul Islam Chowdhury writes for DOT  : 
Presidents and Head of the states are powerful. But exactly how much salaries they are paid per year in various countries of the world? And how does they fare in terms of the salaries they earn against the salaries/ earning of average citizens of their respective countries?
Ranked at number 5, according to various credible sources like, Google/World Bank/ IG Group, President Donald Trump, USA was paid a gross salary of $400,000 a year in 2017. The salary he pulls in is about seven times the average U.S. per capita GDP of just under $57,467.
Austrian President Alexander Van der Bellen’s annual salary before tax is $404,466
Van der Bellen was a professor of economics at the University of Vienna before entering politics. He earns nine times the annual Austrian GDP of just over $44,176 per person.
He ranks at number 4.
Chancellor Walter Thurnherr of Switzerland pulls in $470,281 annually. He is ranked at 3rd.
A physicist and long serving member of Switzerland’s diplomatic corps, Thurnherr takes home just under six times the average Swiss GDP. Which is about $78,813 per person per year.
While Switzerland’s President Alain Berset, sits at second position in the highest earning world leaders ranking by drawing an annual salary of $482,958.
Berset, who holds a Ph.D in economics that he earned in 2005 by doing a dissertation on how migration on a global scale impacts local working conditions, takes home just over six times the average Swiss per capita GDP.
And at the top of this highest ranking current world leaders sits Prime Minister of Australia Malcolm Turnbull,drawing a salary of $527,854 per year.
Before becoming Prime Minister, Turnbull has been a merchant banker and venture capitalist. He is paid about 10.6 times the average annual earning of an Australian.
The writer is Consulting Editor, Amader Notun Shomy