Not sure how much inflation etc to take into account, but:

https://www.theaustralian.com.au/spo...534427fc2bb179

Arnold, 54, will become the highest-paid Socceroos coach in history, signing a base salary believed to be worth around $1.4 million plus various bonuses around the Asian Cup and qualifying for the World Cup in Qatar in 2022.
And I know very confidently that Holger Oseick was the 4th highest paid international coach in the world when he was with us..

What is worth noting, though, is Arnie is coaching the Olyroos also. Not sure how many Australian NT coaches have doubled up like that in the past.