there is a difference between prices controlled in the interest of the the buyer or the seller.<p>For example, in many countries, professional lobbies (lawyers, doctors) influence their set price to what they deem &quot;fair&quot; which means it&#x27;s in their interest as providers.<p>This is different from the government setting a maximum price on soap and milk, which is in the interest of the buyer but not the seller.<p>Taxis are special again, as they often exist in a state of government-controlled monopoly (i.e. taxi licenses are restricted).