I assume your comment is that Amazon would lose money if a union happened?
I have had situations where it was not allowed to move a computer monitor from one cube to another - that had to be done by a union employee. Literally taking a unused spare monitor from one desk, and putting it on another employees desk where it was need. ...and there was a formal requisition process to get that done which took two weeks to get through approvals, assignment, and finally have it done.
I have had union workers walk off the job during a major system outage because their facility managers forced them to take their break time. The whole company was down - it was all-hands-on-deck outage due to Hurricane Sandy. The actual union workers wanted to help us get the systems back online for the company, but the union rep wouldn't let them work.
I have had great workers quit or refuse jobs with our company because they knew and loathed the union - not the company, but the UNION.
I don't have any problem with unions at companies that protect the SAFETY of workers, as they are needed in various industrial jobs. ...but at a TECH companies where workers are making six figures, have matched 401k plans, and safe and comfortable desk jobs? ...it just screams "ridiculous" to me.
Management can choose to share profit fairly in a keep what you catch manner so everyone's interests are aligned, and report accounting fairly, to the whole company.
Or Management can choose to do what Bezos did and ruin the retail market by selling at a loss for 2 decades while playing guile and psyop games with the public; he owns washington post BTW. Amazon is terrified of unions because that means they can't be profitable. Agriculture, Warehousing and logistics are major employers of illegal alien labor; the way Bezos makes money is by undercutting brick and morter retailers' supply chain costs because he doesn't have to hire anyone to run a store.
The reason unions form is management gets abusive; this pandemic is one such instance.