Correct.
Could humans review AI output? Sure. You still need humans. Funnily enough wages won't decline in the long-run - they'll rise as firms compete for those who remained employed in said roles as others fell out of favour and have gaps in work experience.
Many, many variables at play. I never take anyone seriously who never considers this (many people on here).
Wages only rise if you don't include the displaced in your average, which feels a bit dodgy in this context, even if it is technically the accepted practice.