Are we expecting McDonalds to set up a lightning wallet for their cashier to handle all of the money for that day, and then expect the cashier to make the choice between handing that wallet over to the owners at the end of the day or just quit with more than they would make in a year?
I would imagine the idea would be the POS would present a QR code to the customer and would monitor the payment in progress. No need for the cashier to be in possession of anything at any time. How funds are disbursed once received by the corporation is a different question entirely.