Kiosks take no sick days, demand no time off, and their wage rate remains tied only to the cost of electricity needed to keep them operational and for amortization of the original investment, over the useful lifetime of the device.
The big-bucks jobs will be in the manufacture, installation, and maintenance of these kiosks. They will be quickly move from first generation to newer and newer iterations of the concept.
Kiosks don's spit in your food either...