As others have mentioned these workers have so little leverage right now because of the massive unemployment. So even if Amazon was to charge customers more, they could totally just pocket the money and the warehouse/delivery/grocery people would have no position.
It's so completely unfair. Everyone risking their lives to feed us right now should probably be making 2-3x normal pay (and we should be paying a lot more for their services).
I'll tell you why that doesn't work- corruption.
Again, this is wrong. Governments can change in all sorts of ways. In the current hyper-polarized political reality in the US, it may seem like a revolution is required, but just look at the number of changes that have actually occurred under Trump and Obama.
If we could muster the political will to actually address corruption, then it would change, and it wouldn't require a revolution.
The problem is people just don't care.