Hahaha! We aren't the 8th largest economy in the world for no reason. We have 38 million people here because there are jobs, jobs, jobs and more jobs.
There are always the food pickers, true, and those are seasonal, but there are high-tech jobs too. Silicon Valley (the Peninsula south of San Francisco) has been having its job boom for 30+ years. Don't hold your breath waiting for high tech to suddenly disappear.
San Francisco is the banking center of the west with more banks in the city than any other city west of Chicago. A. P. Giannini, from San Francisco, was the founder of the Bank of America.
Southern California employs more people than make up most of the midwest states. The south part of the state has so many military facilities that they rank almost as their own cities. As for jobs, southern California has ALWAYS attracted people from all over the states and world, because there are ALWAYS jobs for the skilled and educated.
Then, there is the weather. MOST people think that six months of winter snow, ice and miserably cold weather ISN'T fun. Some of the biggest Sun Belt retirement homes started in southern California. NOW they are just too darned expensive for the average non-California retiree, so they retire in less expensive Sun Belt states.
Maybe the Manila City Dump is what it looks like where YOU live but that won't be California. Try again.
Just keep whistling past that graveyard.