Some younger folks will start growing their own food, others will demand the government give them food.
Where do you think the government will get the food?
I don't think monocultures and chemical farming feed the world if that's what you're implying.
All of Europe subsidize their farmers because tourism requires the landscape be kept looking productive. You will find that most of Asia and the tropical world is divided into acre plots worked by families and harvesting four crops a year. Although Australia has followed the US example, our farmers are moving into Regen. Ag. both to be financially viable and to keep the farm in good nick for their children.
I do worry about market gardening with their trend towards indoor gardening and hydroponics. Chefs are my big hope there because they are supporting 'niche market' growers.
Community gardens and farmers markets are growing in popularity. Everyone who tastes 'homegrown' becomes addicted to good old fashion 'Taste'.
The government is in the background and ethically motivated charities and individuals are servicing the poor.
Don't forget we throw out more than a third of the edible food we produce because of unnecessarily high 'appearance' standards. Don' forget the US uses most of its monoculture crops to produce biofuel, processed cosmetics, pharmaceuticals and feedlot supplies.