Every market has some rules and boundaries that restrict freedom of choice. A market looks free only because we so unconditionally accept its underlying restrictions that we fail to see them.
Free market economists frequently see minimum wage legislation as mere political intervention. However, there are decent economic theories which show that, under certain circumstances, minimum wages can be beneficial, as it makes workers more productive.
The truth is that the free movement of goods, people, and money that developed under British hegemony between 1870 and 1913 - the first episode of globalization - was made possible, in large part, by military might rather than market forces.
It is impossible to objectively define how free a market is. This is a political definition. Government is always involved, and those free marketers are as politically motivated as anyone.
It is time that we dispensed with the myth that the market is a force of nature that should not be meddled with. Markets are social creations that can be, and have been, modified for social purposes.