Coming from an area where grape production is dropping the water table like a rock, and farms are getting more and more automation, I find it hard to believe these business models will change without either collapse of the paradigm, or serious government subsidy. The methods we all embrace and are developing are not suited to debt-based farming, period. They are labor-intensive (at least at first), and do not generally mesh well with large harvester machines. Plus, margins are razor-thin. Multi-million dollar lettuce farms net roughly $45-55K for the farmer, fuel and equipment takes a huge chunk, but still the trend is toward more machines, not less.
I think you'd need to see a major change in the way funding is handled before you'll see any change in methods. Private funding might play a significant role in this, since governments typically move too slow, do silly things and/or end up stomping on the little guys, i.e. OMRI.
How about subscription farming coupled with some sort of GoFundMe project? In fact, why even focus on Big Ag? They will go the way of the Dodo sooner or later. Some things just take time. I really don't think a top-down solution would be the best idea. Unfortunately, that lands us back at education to get the public wanting the produce we grow, not cilantro from Mexico fertilized with raw sewage.