1800 to a regular family with combined income of 100k is about 2% of annual wages.
1800 to a single digit millionaire is 0.2% of annual wages, equivalent of about a couple hundred bucks for you and me.
1800 to someone who makes ten million a year is equivalent of about 20 bucks.
A millionaire is just someone who has a million dollars/pounds/whatevers. We probably need a specific word for someone actually getting paid that much in a year.
It’s obvious a billionaire doesn’t get paid a billion dollars a year.