Donate time and money to groups championing a few common sense things the majority of the US supports--and the rest of the world already has. Ie. mandatory paid sick leave, mandatory overtime pay, paid maternity leave, socialized disability pay, higher minimum wage floors, etc. Hell, even support for single payer healthcare hovers between 55-60% depending on the poll. These are all likely to happen within the next 10-30 years.
And you might think, but that's impossible in our current climate! This time is different! But looking at it historically, the US changes course and its public opinion shifts dramatically all the time. All it takes is a few viral news stories and some hit TV Shows and we (as a group) change our opinion.
When public opinion changes, policy changes follow (with a 10-20 year lag or so) since the US is a democracy. Think Marijuana legalization, Gay marriage legalization, etc. etc.
If you don't like interacting with the law making political machine, you can try to help influence the public opinion side. Create media, PR campaigns, etc. There's tons of things you can do instead of spending time/money to avoid Amazon. They are doing nothing wrong based on the rules of the game we set up for them.
I have nothing I can possibly add to your excellent comment, but I just wanted to say your attitude is a refreshing viewpoint in contrast to all the doom and gloom you read about in newsrooms around the world (I'm sure it sells a ton of copies though! That's good for the economy, right?)
How?