If you read the article, you’d have the seen that the answer is that (1) California has regained all of the jobs it lost in the 2008 recession, but (2) the population of California has increased sharply since 2008, so merely regaining those jobs isn’t enough to lower the unemployment rate.
I know, I know, I was just being a smart ass.
And a careful reading of the article says those who returned to the work force are “involuntarily working part-time or “marginally attached”. It doesn’t report how many of these people have taken lesser jobs just to pay the bills. They’re just reporting they’ve returned to work.
So the middle class continues to shrink. I’d feel sorry except most of these people keep voting in Democrats. You can’t fix stupid.