I would respond to this from a different angle. As one of Sander´s biggest supporters, I think it comes more from spending most my life and running a business in a third world country where there is the total opposite of the nanny state. Social darwinism at its finest. Low to non existent taxes, a weak weak state that translates into rampant corruption and laughable control, a pathetic justice system, the minimum of social investment and infrastructure, absence of a safety net, piss poor public education. Hard to get credit . . . I could go on and on, I think you get the picture. The third (and often fourth) world.
I also lived for years in California and Europe and know how lucky you guys are for the "nanny state" so many love to slag off. It´s not rocket science why us folks of the the third world want to emigrate to these "nanny states" of Northern Europe and North America. It´s not because of handouts, it´s because of economic opportunity and relatively well paying jobs that stem from a capitalism with "nanny state" benefits derived from its recent past, quality society they have fashioned from public investment in education, infrastructure, in safety nets, in spreading the fruits of capitalism in a fairer, more equative way. Dare I say, in a more christian way.
I think Sanders stands for the benefits of what a "nanny state" has to offer and can offer, given the political will. A fairer, more "christian" enjoyment of the fruits of capitalism.