When money is the driver of a corporation's behaviour - creating goods in the most economical way possible makes sense.
Not all goods are created equal however and while the cheapest manufacture process for a corporation may be valuable - there are workers rights to consider as well. It's no coincidence that the cheapest places to manufacture are those which have the loosest labour laws. Looking after workers costs money.
And therein lies the problem of modern day neoliberal policies. Simply put, neoliberalism supports the use of foreign countries to manufacture goods whose low prices exist, in part, because of substandard conditions.
And conversely, this is the problem that Fair Trade companies solve. They respect all levels of the individual and don't treat them as just expendable pieces of biological meat. Fair trade rules dictate policies such as reasonable working hours, a livable wage, health insurance, along with sick and personal leave. All designed to improve biological quality, provide equal social dignity, and give time away from work for the individual to grow.
That's what makes fair trade goods better than their non fair trade counterparts. They're supported by many of the codes of the MOQ. From 'the law of the jungle' in that they improve the health of their workers, 'The Law' in that they respect the workers right to not be abused, and finally the Code Of Art by providing downtime and space for growth.
That's why being on the right side of these codes is what makes, when possible, buying fair or locally made goods moral and supported by the MOQ.