I presume you've looked at the way the protections are calculated: there are a lot of judgement calls in there - multipliers and so on - that reflect the philosophy of the people who created the system rather than anything objective.
And it's great for us that the correlation between their measure of what they think is important for a well-functioning labor market is not really all that well correlated with more objective measures like employment rates, unemployment rates, labor productivity, and so on. It really helps to nail our case. If their theories were right then the US and UK should dominate everybody else in terms of employment and productivity, and they don't.
That's why I refer to it so much.
Just like using data from the Economist or the Financial Times? ;-) In the long run, we're all dead. John Maynard Keynes