Yes, but how is that related to the OP's Laffer Curve bullshit? High-income and therefore progressively taxed households are the only people still migrating in to California. Migration out of California has everything to do with cost of housing and nothing to do with taxation. The lower-income households that flee the state for Texas, the top destination, are more taxed in Texas than they were in California, but the people migrate anyway because the housing cost difference is larger than the tax difference.
Yes I agree. But when people say California is the most heavily taxed state in the nation, its usually a weasel interpretation where they mean California's pay the the most taxes not related to a percentage of their higher incomes. The real killer in California is simply the rent is too high (even food costs are pretty reasonable compared to other states).