not relevant, free market, they decide to work there, or not.
Yea they can decide to move to the next low-pay job, zero-hour contract, no benefits, wages barely pays the rent, on food stamps ..
If the free market is a fair market, unionising wouldn't make any difference as the negotiated rates would already be fair and couldn't be any more fair. Amazon wouldn't be spending money to block union efforts, because that would be wasted money. Therefore either this isn't free market, and your comment is wrong (not free market), or this is free market but it isn't fair so your comment is wrong (free market, yet still relevant).