It would have been nice if this article addressed the negative consequences of these companies skirting labor laws. The only mention of this is here:

"she alleges that these firms exert the kind of control that employers would have over employees — without providing any of the benefits employees, by law, are entitled to."

But it doesn't explain what specific benefits are being withheld from employees, so I don't know what bad thing she is trying to prevent, or the magnitude of the problem, if there really is one.