We still live in a free country so when states like California and Washington treat their best entrepreneurs like evil piggy banks they can simply up and leave, going to places that welcome them, like Florida, Texas, New Hampshire and others.
These other states also aren't suffering from catastrophic fiscal mismanagement and rampant welfare fraud, so their taxes can be commensurately lower (zero income tax in the above states, with New Hampshire also not even having a sales tax!)