Doubtful. It's just easier to not do it and take the new wages. You'd have to eliminate everyone, and start over. Doubtful performance reviews would motivate them either with/without said raise.
When the precedent has been established as doing less than expected and no negative ramifications, it is difficult to get those same employees to change. If you have good employees already, then that's the norm.
I've had good and bad experiences with Amazon delivery. I have no idea if those good/bad experiences are from 3rd party people hired by Amazon or if they are Amazon employees. Doesn't matter to the end user though. Just like in any large organization, there will always be lower performing workers. When you're so desperate that you cannot eliminate these workers, then there is no incentive to change. Just like other uniform wearing services, it's the "bad apples" that get all of the attention, and they are probably vastly out numbered by the good apples. That's just not how society works by focusing on the good when there's so much more traction by beating on the negatives (just look at the socials and their entire core functionality).