[JCharante]

Why would a grower refuse to participate in either program? They wouldn't get the option to not not-get subsidies. Their incentive to participate in getting their products certified for SNAP and WIC is that their costs are now higher so they have to raise their prices, and so then it'd be more important for them to get their products certified so that SNAP and WIC recipients can purchase them (thus expanding/retaining their customer base).