Really, some of the stuff you read on HN is just mind-boggling.
In spite of the gig economy trying hard to erase decades of stability for millions of people even the smallest attempt at reductio-ad-absurdum would show that there is an optimimum somewhere and that there is absolutely no law of nature that dictates that that optimum lies at $2.75, $7, $15 or anywhere in particular.
Whatever you make the minimum, there will always be people who earn just a bit more and of course it will lead to some inflation but the end result will be a higher standard of living for those for whom the change is the most important.
For all the laughter about the EU from the US when it comes to social security I'd like to point out that Amazon already operates here and has to pay the local minimum wage and that consumers are still buying their products.