It's worth keeping in mind that the travelling carpenters are a souvenir from dark times in Europe, when economic progress remained extremely slow because craftsmen were evaluated by their belonging to a guild and would not compete.
It's worth noting that those 'dark times' were periods of perfectly ordinary economic growth compared to the rest of the world and all the millenniums previous. Comparing those times to the Industrial Revolution that came shortly after is a little unfair - no tradition or souvenir compares well.
When that crumbled, city states took over, and economic life was once again dictated by the whims of rulers who in reality depended on keeping the ruling classes of the cities in their empire happy; in these cities, tradesmen classes operated in rigid, protectionist and mercantilist guild systems. There was stagnation and in many fields enormous regression until the Enlightenment and the Industrial Revolution (when freedom brought back the drive for progress).