You can guess what has happened. Some economists and business leaders are showing considerable skepticism about this, which seems reasonable to me; certainly there's plenty of theory and data out there about using wages not only to pay employees fairly and keep them happy, but as an incentive.
On the other hand, I think it is a noble experiment in not privileging certain types of work over others. That administrative assistant is also keeping your company together.
But then there are screamers screaming "Socialism! It never works!"
People, get your definitions straight. Here's the brief Wikipedia definition of Socialism:
Note: Dan Price voluntarily decided to give his employees this wage increase. He still owns his company. No government or government regulation forced him to do this. It is not by any stretch of the imagination a Socialist move for a business owner to set wages at a rate he deems fair, rather than paying minimum wage or letting the "market" set the wages.