[Avodah] Non Jewish harvesters

[Ben Waxman]

Rambam, Matanot L'anayiim B:10: Do not hire non-Jewish workers to 
harvest because  they are not experts in leket and pe'ah.

The Radbaz explains that since the workers aren't experts, they will 
either give too much pe'ah or too little.  Meaning, the issue is 
technical, not that they aren't chayav to give and therefore they can't 
do it.

What is the issue then? The farm owner tells them "Harvest up to here 
and leave areas A, B, & C alone". If needed, the owner does it once or 
twice with them.

Ben