<i>&gt; It is logical to require you to have a license to fill a cavity for safety reasons. It is not logical to require a license to cut hair.</i><p>You mean there are no &quot;safety reasons&quot; involved in cutting hair? A person with sharp implements around your head and neck poses no safety risk?<p>Also, even if the &quot;safety reasons&quot; are more compelling for dentists than for barbers, that&#x27;s still not a reason to have the government doing the safety checks by means of licensing. Private organizations could do the same safety checks--plus, they would have an incentive to do only the checks that actually added value, whereas government has an incentive to impose any requirements that have enough of a political constituency, whether or not they add value.