Of course, that is why I mentioned those different pay schemes, but my main point was the "rock bottom" part, with the emphasis that those schemes already facilitate low wages, in ways that more typical/standard wage schemes do not, so the farm workers will be particularly vulnerable to having their wages cut.They already work and are paid that way on your current prices. But there could be significantly less.
The amount significant, of course, relative.
Your point about "relative" is well made. Relative to how much it costs you to eat, being the most straightforward concern. If a worker could easily and legally come over to the US from another country... say Mexico, for instance, work all day and then go back home where prices are relatively lower, that worker would be able to make a living on the low wage without having to starve or go homeless...