The only way to go about this would be government regulated price control which is an infringement on individual rights.

The salads are actually fresh so it costs more. The junk food, so called, is not and therefore costs less.

People would be like "oh sht I can't afford to eat this much junk anymore. It's puttin a big ol'hole in my wallet."

and depending on the rate by which it's increased the people who sell junk food will either benefit or stay the same.

But with healthy food it maybe different. The same people who dislike the healthier food are probably still going to dislike it so any places that sell healthier foods are going to suffer due to the lowered cost. Maybe...depends on the rate of decrease.

No, a free market should determine the price of all this shit.

People won't start eating salad just because their favorite snicker is now 8 dollars. They'll just be pissed off buying that 8 dollar snicker's bar before we have another Boston tea party.

The only reason the government gets away with over taxing cigarettes is because the people who smoke are so few, and so unmotivated that the chances of them revolting are practically none.

Also forgot to add, people who sell junk food, they won't stop selling junk food, they'll find ways to turn a profit, meaning if no one is buying enough healthy food to turn a profit, people are getting laid off until their losses are minimal.