If this was true then wages and productivity would be closely tied together and they aren't. In fact the last 50 years productivity has gone through the roof while wages have been stagnant. Which is why the world has exploded with multi billionaires over the last 50 years.Labor will be paid up to its marginal revenue product. Make labor more productive with better training and job skills. Make labor markets more competitive by reducing barriers to entry on both the labor supply and labor demand sides.
It's not my employer's responsibility to pay me, it's my responsibility to be enough of an asset that they pay me or I find someone who will.
Labor will get paid whatever the next person in line will take the job for and with China coming online the line was very long and very cheap over that time period.
Guess what? The line is getting shorter everyday because of low birth rates throughout the world over the last 30 years and and there isn't another country with billions of dormant citizens to bring into the labor market. Over the next 20 years labor is going to get more and more expensive every single year while productivity will stagnate.