There ARE legal ways to get employees.

One would think you'd know that, if you run a farm and have used
slave labor (ie. illegals) before:

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"To work in the U.S., foreign citizens generally need a work visa, which
requires sponsorship from a U.S. employer and a petition filed with USCIS.

Temporary worker visas allow for fixed-term employment, while immigrant
visas can lead to permanent residency.

The process typically involves the employer filing a petition, followed by the
applicant applying for the visa and attending an interview."