Hello and thank you for entrusting me to answer your question. I am very sorry to hear about your wife's difficulty in getting paid.
Her best recourse would likely be to file a wage claim with the Department of Labor Stanfards Enforcement. The "DLSE," as they are commonly known, will investigate your wife's employer and issue a judgment for outstanding wages in the amount determined to be owed. If the DLSE finds that your wife's employer's failure to pay was willful, the DLSE may also issue fines.
California law prohibits employers from retaliating against employees for making wage claims, so any effort of your wife's employer to terminate her, demote her, or reduce her pay will give rise to a separate cause of action for compensatory damages.
To file a wage claim with the DLSE, visit this link: http://www.dir.ca.gov/dlse/howtofilewageclaim.htm
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