Grounded27, unlicensed labor isn't necessarily a problem per se if suitably managed. Remember, many of these will be competent guys who are simply building their hours towards a licence. Others may be connies with many years experience and no desire to get licensed. In component repair companies there wil be no licensed guys because the company holds the approval not the individuals.
If your observation relates to maintaining an acceptable ratio of experienced to inexperienced staff then you might hope the company's own procedures and the regulators' oversight would keep this within acceptable limits. Hope perhaps being the operative word...