Does government subsidize Walmart?

Bernie Sanders claims that government subsidizes Walmart because Walmart doesn't pay high-enough wages.

Why isn't Sanders criticizing housing markets and landlords for driving housing costs to levels that require subsidies? In fact, why doesn't Sanders realize that where subsidies are available, housing markets raise prices to maximize revenues from both subsidies and out-of-pocket payments combined?

If Sanders gets his way and Walmart raises wages, would he then advocate to cut subsidized housing and food assistance programs? No, he would advocate for better funding for them, which would stimulate further price-increases as people would spend a higher overall combination of wages and subsidized handouts on things like rent and food, whose prices go up as high as demand will allow.

When will Sanders and others who advocate for higher wages grasp how inflation works?