Since April 2008, the population in age group 25-54 declined 0.8%, but the labor force declined 3.6%, and employment declined 4.6%. ...
In the core age 25-54 age group, the population is down 1,053,000 but employment is down a whopping 4,614,000.
Thus, in the 25-54 age group, roughly 3,561,000 people are not working who should be working. The figure is higher if you include other age groups.
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Mish is looking at the issue from a zero-sum perspective which forgets that the age groups have changed in composition over time. Of course employment levels are down. The question is where did it all go, and why did it go there.
The 25-54 age group was full of Baby Boomers in 2008 who in 2014 are now in the 55+ category where the employment level has continued to grow and grow despite the recession. What has happened is that the Baby Boomers in the 25-54 age group have been replaced by subsequent demographic tranches bringing up the rear which were much less numerous because birth rates to Baby Boomers dropped dramatically compared to their parents' era. As a consequence no age group will ever reproduce labor force sizes which match what they were as the Baby Boomers grew up. In fact, the size of the 25-54 group will continue to decline for five more years until all the Baby Boomers cross over to the 55+ group.
The supposed four million+ deficit in employment in the 25-54 age group today can be explained entirely by demographics.
I presented the data
here, concluding:
"It appears therefore that the fall-off in the employment level of those 25-54 can be explained entirely by the aging of their cohort in which many millions over the last seven years have moved on to the next level, and by the failure of the younger members of this group to bring up the rear in terms of their aggregate numbers because there just weren't enough of them born. The reason for the decline of their employment level is therefore structural, not economic, and will continue to be so for the next five years.
"Indeed, workers aged 55 and older have escaped a decline in their employment level. There are in fact 6.9 million more working at this age right now in 2014 than there were exactly seven years ago, which is what one would expect from the data. The Baby Boom is simply aging and continuing to work as it did before, and it has a lot of room left to run."