A leftist mental disorder starts in childhood and is commonly triggered by birthday and Christmas trauma, primarily envy over the visible size of someone's slice of birthday cake or Christmas gifts. "No fair! His cake is bigger than mine!" Leftism develops from a sense of being on the left side of the bell curve in life. The nature of envy is not to acquire what someone else has but to destroy what they have. There is nothing leftists won't envy: money, cars, house, family, health, beauty, brains, fitness, friends, and in this case: food. If a leftist must be on a salt or calorie restricted diet, everyone must be. It all goes back to "No fair! His cake is bigger than mine!" They are convinced true happiness is only possible if everyone is exactly the same in every possible respect.
The antidote to leftist envy is mockery. Make fun of leftists and their envy at every opportunity. Counter a leftist's painful feelings of envy by inducing in them equally painful feelings of shame.
“I can see the left going to food rationing where everyone would be allowed a certain allotment of certain foods and a coupon system to buy the foods.”
It’s called food stamps.