Rulings have come down that illegals are entitled to workers compensation if injured on the job.
The state could seek reimbursement from the individual that hired the illegal for medical expenses paid out by the state for an injured illegal. I don't know whether homeowners insurance would cover it, since it is unlawful to hire illegals.
My reaction is that if the employee had money deducted for workers comp insurance, the employee should get compensation regardless of legal status because this is insurance, not welfare.
Now if no payment was made for workers comp (or unemployment insurance for that matter), the employee should not collect for either illegals or citizens.