Right after they pay California’s share of the national debt (which I hear is a lot) they are free to go but you don’t get to run up your debt and then leave.
Good point. They owe about a trillion dollars. They can also refund all federal funds for the last couple centuries, pay fair market value for federally owned land, pay relocation & losses for all dissenters, and pay a 25% inconvenience fee. Otherwise we’ll consider it theft and seize assets accordingly.