From The Conversable Economist:
In a common market, labor costs will look fairly similar across areas. Sure, there will be some places with differing skill levels, different mixes of industry, and different levels of urbanization, thus leading to somewhat higher or lower labor costs. But over time, workers from lower-pay areas will tend to relocate to higher-pay areas and employers in higher-pay areas will tend to relocate to lower-pay areas. Thus, it's interesting that the European Union continues to show large gaps in hourly labor costs.
Here are some figures just released by Eurostat (March 31, 2021) on labor costs across countries. As you can see, hourly labor costs are up around €40/hour in Denmark, Luxembourg, and Belgium, but €10/hour or below in some countries of eastern Europe like Poland or the Baltic states like Lithuania. (For comparison, a euro is at present worth about $1.17 in US dollars. Norway and Iceland are not part of the European Union, but they are part of a broader grouping called the European Economic Area.)
Another major difference across EU countries is in what share of the labor costs paid by employers represent non-wage costs--that is, payments made by employers directly to the government for pensions and other social programs. In France and Sweden, these non-wage costs are about one-third of total hourly labor costs. It's interesting that in Denmark, commonly thought of as a Scandinavian high social-spending country, non-wage costs are only about 15% of total labor costs--because Denmark chooses not to finance its social spending by loading up the costs on employers to the same extent....
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....These differences suggest some of the underlying stresses on the European Union. Given these wage gaps across countries, tensions in high-wage countries about migration from lower-wage countries and competition from firms in lower-wage countries will remain high....
....MUCH MORE