Only asshats scream about a result on something like this before they see the data. You don't launch a site and buy a new car because you expect it to do great... You watch the data that comes in and then decide to scale up or change course based on that data.
Digging into data to find impact of Seattleā€™s $15 minimum wage | The Seattle Times
The data is being collected but it isn't in yet. Give it until the end of 2016, by then you'll actually know if it works or not... Which is exactly what states are supposed to do, test out laws and then the fed scales up nationwide or the state changes course based on results.
Seattle Washington is doing the best at this currently. Min wage, legal weed, same sex marriage and more... Test it all, track it all, scale up what works and drop whatever does not... Why guess when you can know the actual answer?