It's not realistic in our outdated system that has long past it's useful purpose but if you want this country to progress at all and the world to progress then absolutely school should be free to all, along with healthcare and basic housing and a basic right to fair pay. If you want this country to continue the downward spiral of widening the economic gap of the rich and everyone else, by all means support the status quo.
When the education system is a for profit entity there is a deep fundamental flaw. When the healthcare system is for profit there is a deep fundamental flaw. Doritos is an excellent example you bring up, since it has harmful chemicals and bullshit junk that no one in their right minds would ever include in food unless it's about maximizing profit and making the shareholders money, so that ethics, quality and everything else go out the window, and they realize hey! We can save millions of dollars to switching to a chemical that is used in rubber car tires, so what if it's harmful it will widen our profit margins, brilliant! If this is the world you're OK with, where the worker bees work too much, get sick, fall behind in medical debt, struggle to pay their mortgage if their lucky enough while getting fucked over in every which direction, well that's a pretty sick and twisted world view. It's time we start evolving this country and become more progressive rather than go backwards.