Is a state law impairing a public employee's right to compensation?

Article I, section 10, clause 1 of the United States Constitution prohibits the states from passing any law impairing the obligation of contracts. Article I, section 9 of the California Constitution contains a similar clause providing that a "law impairing the obligation of contracts may not be passed." Generally, a public employee's right to compensation, once vested, "cannot be eliminated without unconstitutionally impairing the contract obligation," and that "[w]hen agreements of employment between the state and public employees have been adopted by governing bodies, such agreements are binding and constitutionally protected." (Olson v. Cory, supra 27 Cal.3d at p. 538, 178 Cal. Rptr. 568, 636 P.2d 532.)