Poor people are leaving to other parts of the USA slower than rich people are moving in from other parts of the world; California has net in-migration despite net domestic out-migration. This is bad in terms of domestic political power, of course, but it's directly a consequence of economic success.
It has lower net growth than many other parts of the country, but that is not just a matter of migration but also the lower natural growth rate that usually accompanies greater wealth. And it's not one of the places actually shrinking because people are actually fleeing, not being displaced by richer people—there are a number of states where that is true, but CA isn't one of them.
I'm familiar with the statistics, the issue gets raised here every couple months or so. You and your friends from. Google aren’t the whole universe. Sure, some well-off people leave and some less well-off people move in, but that's not what is dominating the aggregate statistics.
And it's happening: people are fleeing the state.
"California likely to lose congressional seat for first time in history after 2020 Census. Californians moving out lead to cut in Golden State’s political clout."
"other states like Texas are expected to gain as many as three new seats"
https://www.mercurynews.com/2020/01/03/california-lose-congr...