Here is an interesting comparison of vacation and holiday times, as mandated by the OECD countries:
It only emphasizes that pure comparison of salaries in different countries are very far from displaying the full picture. For example, a higher salary in the US matters way less when you compare it to 30 days of paid annual leave in France. In some other countries, as well, what you get back for your tax money counts a lot. Issues like infrastructure, human rights (in Finland, people have a right to Internet access of 1Mbps) and so on can make a significant difference in the quality of life.
Also, have a look at this research into the topic, from Mercer.