The first sentence here is such a massive point I think, what seems right on a micro level so often ends up being wrong on a macro level, I think the minimum wage stuff is a good example, opposed by free market economics because it looks on a micro level and sees firms costs being pushed up -> profits down (or inflation), but at a macro level, increasing wages (especially at lower incomes) leads to an increase in spending (because the marginal propensity to consume is higher at lower income levels, as you get richer money tends to be saved or invested). This is an increase in demand (and also increases the speed of circulation of currency), which means more sales and thus more profit. Henry Ford discovered this for himself back in the 1910s or 20s when he raised the wages of his workers to $5/day to reduce staff turnover and found himself making more profit because now his workers could afford to buy his products so he sold more.
ime, sadly, the libertarian hegel/von mises/friedman followers seem unable to really comprehend the macro arguments, whilst keynesians can get to grips with the micro stuff quite happily, just give primacy to the macro stuff - which is generally based more in empricial evidence than the heavily theory led micro stuff ime.