Amazon has to pay more because their jobs are shit. They aren’t doing anything to raise wages they’re just trying to get people’s asses in the door. I’m sort of shocked you linked to the department of labor’s historical page as some sort of proof of your idea.
I can guarantee that wage is the minimum they can pay to get people in the door for the level of work required by them calculated by a legion of economists.
The fact you think Amazon jobs are competing with “Nannies/house cleaners/employees” is equally strange. Like somehow these jobs are related?! Why do you only compare those jobs to Amazon factory jobs?