You ask me if violating the law is okay if the end result is cheaper prices. I'll humor you in that I'd believe that yes, it is okay if the circumstances warrant it. If the alternative is food that costs thrice what it does currently and the laborers that process that food can't even afford to buy it, then I'm all for violating the law.
And I am for following the law. If they law says that it is okay to hire people that are violating the law by being here, then that is a different story. Right now it is illegal for them to be here - regardless of the effect on our prices. Laws can be changed if needed, I don't think that one needs to be.
The amount of time between slipping on the peel and landing on the pavement is precisely 1 bananosecond.