No other provision in any other statute which provides wholly or partly at the expense of the State or any county for pensions or retirement benefits for employees of the State or of any county, their surviving spouses or other dependents shall apply to members, retirants, or beneficiaries of the system established by this part and parts VII and VIII of this chapter, their surviving spouses or other dependents, except such benefits as may be provided under Title II of the Social Security Act.