I think education in how to eat healthy is a key factor! Yes, it may be more expensive to eat healthy, but I believe that if we educate people as to why they should fork over more money for healthier foods, the ones who are financially able to do so might just do it.
I say it may be more expensive because of this: when I gave up refined sugar and refined/white grains and potatoes a year ago, my grocery bill went up significantly. OTOH, I very rarely stop for fast food anymore (if I must eat fast food, I can always go with salads and burgers removed from the buns, but it’s tastier to eat at home), and very rarely order pizza (it’s a lot less cost-effective to eat pizza if you can only eat the toppings), so I’m sure the money I used to spend on these things have off-set the cost of the higher market-bill. But let’s assume that it is more expensive to eat healthy. So what? Well-made furniture is more expensive thatn poorly-made. Well-made shoes and clothing costs more. Lots of people are willing to shell out the bux, because they realize that this stuff is worth more. Well, healthy food is worth more, too. This is what we are fueling our bodies with, folks. What’s more valuable than that?
Also, education can go a long way towards alleviating the “time factor fear” involved with doing your own cooking. My microwave, George Forman grill and crock pot are all spectacularly helpful. As is meal planning. I take an hour each week to plan my meals. This way, I can use my markets’ sale paper to take advantage of what’s on sale. Also, I can look at my schedule, and see that, Tuesday, for example, is really busy. So, I’d better plan a crock pot meal for that day. That way, I can put it on to cook in the morning, and serve a hot, healthful dinner in almost no time at dinner time. Also, planning ahead allows me to cook doubles of some recipes (things like stews, spaghetti sauce and meatloaf, it’s just as easy to make double and freeze half), so on really, really busy days, all I have to do is take something pre-cooked out of the freezer and microwave it. But a lot of folks just don’t know how to do this stuff. They’re not dumb, just uneducated.
I realize that for the very poor, some of this might not be realistic, but for the average person, I think it is. It’s just a matter of education.
As for exercise, I’m more likely to do it if I’ve scheduled it. If I wait until I have time, I never have time. Richard Simmons videos (if he doesn’t drive you nuts) are great family exercise, cuz the kids love to dance along, and they consider it “time spent with mom”.