I agree that I would hate to be in a temporary employment-type position, but ultimately it's what the market will bear. Amazon doesn't spend money it doesn't feel like it has too, which unfortunately makes its priorities crystal clear in terms of employment. If Amazon has no incentives to hire these people full time, they won't. It's pretty simple.

I think having people willing to clean up after others and keep the environment tidy and hygienic offers a lot of value.

I agree, having been one of those people. I just meant that those jobs are not so specialized that it's hard to find other people if you fire your existing cleaners regularly; unfortunately there are more people who need the money than can afford to give such unethical employers a wide berth.

They do, but there are a lot more people asking for that job than for the engineering jobs.

It's likely government regulation that forces them to choose between letting them go or paying them more.

Well, we can't possibly go giving people raises after almost a year of productive work. Next thing they'll be wanting holidays and sick leave. Seriously, what does a low-level employee have to do to get treated as something more than an expendable labor unit?