Well in the present America system, massive subsidies to large industrial farm operations have made small farming unprofitable. This is certainly a distortion - but I would argue that this is socialist/corporatist or otherwise fundamentally non-free market distortion (even as the government that perpetrates it and the large farmer operations who receive the funds all think of themselves as “capitalist”). 

So essentially these large farmers, buoyed by theft and redistribution are freed from true competitive market forces and begin to operate as quasi monopolies and territory controlled enclosures. This dramatically lowers the bargaining power of agricultural workers, I’d argue suppressing the wage ceiling more than impacting the wage floor. 

However even under these conditions, if there is someone willing to work for less, it is because they have means / tactics / are willing to make sacrifices to do more with less either immediately or over the long term. Even if there was a more healthy and dynamic spread of small, medium, and large farmer operations for agricultural workers to choose from, this would not eliminate that they may still be someone willing to do the same work at sufficient quality for less.

The death of the living wage is the result of money printing, central planning, an redistribution from the bottom up - call it socialism if you’re right leaning, call it corporatism if you’re left leaning - but not the result of “capitalist scheming”