Contrary to what professional economists will typically tell you, economics is not a science. All economic theories have underlying political and ethical assumptions, which make it impossible to prove them right or wrong in the way we can with theories in physics or chemistry.
What free-market economists are not telling us is that the politics they want to get rid of are none other than those of democracy itself. When they say we need to insulate economic policies from politics, they are in effect advocating the castration of democracy.
Indeed, willingness to challenge professional economists and other experts is a foundation stone of democracy. If all we have to do is to listen to the experts, what is the point of having democracy?
I am one of the most successful economists, according to what markets tell us, though most of my professional colleagues, who are much keener to accept market outcomes than I am, would dismiss me as a crank or - the worst of all abuses among economists - a 'sociologist.'
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.
People tend to think that numbers are quite objective, but numbers in economics are not like this. Some economists say they're like sausages: you don't know what they really are until you cut into them.
Unfortunately, a lot of economists wanted to make their subject a science. So the more what you do resembles physics or chemistry, the more credible you become.