Paying above the minimum wage is the right thing to do. Glen Murphy ran the Shoppers Drug Mart chain in Canada - albeit a very successful pharmacy and life product retailer - and grew that organization to the behemoth it is today. There is (almost) at least one Shoppers in every neighbourhood.
I suggest, however, that his Canadian roots could have been influenced, at least in part, by the government-mandated minimum wage of $11 per hour.
Our local "City Bakery", in Waterloo Region, Ontario, Canada, starts employees at $18 per hour, far above the mandated minimum wage. At City, nobody asks you to pay for what you eat or order, because customers are on the honour (Canadian spelling) system. There's an old-time transit fare box, where you can put your money. People flock to City Bakery because of how the owner treats employees, and also for the incredible bread. The payment system allows customers to be more generous than they need to be. That's a real example of standing behind your employees and trusting your customers.