More yet, there's a causal relation between the bottom of that graph and the top. Why aren't real wages progressing in the developed economies?
As for the first, no distinction is made between social contributions paid into specific funds and giving specific rights (most of the French case) and income tax paid into the general national budget (most of the British). Yet the difference may well help to explain why France has a comparatively good health system, for example, while the UK has an increasingly hopeless one.
And of course, price increases for qualified workers in emerging economies simply reflect that productive workers are rare and need to be paid increasingly expensively (to be attracted, or to be trained). In the long run, we're all dead. John Maynard Keynes
The indices for judging social performance are, overwhelmingly in terms of public discussion, misleading indicators of societal strength and resiliency. Blogging regularly at Get Energy Smart. NOW!!!
This is why thsee tables (and the accompanying discourse) are so noxious:
What we CAN object to, is the extrapolation of decisions based on such statistics. As we all understand, where human beings are concerned, the question you ask defines the answer. You can't be me, I'm taken