I feel like you are wearing some very strong rose colored glasses; I personally think it’s naive to believe that remote workers are always highly engaged. People optimize their work productivity around different personal goals.. and I have worked with many who seem to try to do as little work as possible to not get fired. Which often involves a lot of loathing and procrastination.
It would be wonderful for employers and employees alike if computer work was always interesting. But it just isn’t. Amazon Turk workers are in front of computer out of necessity and probably would like to commit the least amount of work for the maximal possible reward. I happen to be of slightly better means but share their sentiment exactly.