If next-day delivery requires unfair working conditions, then yes we should drop it. However, it's a false dichotomy to pretend as if the alternative to "next day" is "three weeks."
The Unionised Royal Mail seems to manage next day delivery fine. Does any country have a unionised mail service where you wait 3 weeks, or even 1 week, for packages?
Are you going to wait 3 weeks for your deliveries to arrive?
First, you know full well that it won't be three weeks. However, I'm willing to allow a bit of exaggeration to make a point. But let's make the argument reasonable: I have to wait five days for the equivalent of UPS Ground from the other coast (UPS, which I will point is unionized and offers next-day delivery). As a trade-off, drivers aren't pissing in bottles. Are you saying you'd rather drivers piss in bottles rather than wait a few more days for delivery?
But of course all of this is moot: many examples abound of delivery companies capable of delivering things the next day and having a unionized workforce.
My life has been just fine without next-day deliveries. It has also been fine without being the master of a slave plantation, or having a live-in servant that works for pennies and sleeps in a closet, or a number of other things that would make it more comfortable and convenient at the expense of others.
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(It does, unfortunately, depend on a large number of people growing my food, making my clothes, and soldering my electronics largely being treated like shit, but none of those are immutable facts of the world.)
