Nothing in this chapter shall be construed to define or otherwise grant any right or privilege to post-employment benefits or any other benefits to any person other than those post-employment benefits, rights, and privileges previously or already granted to employees, retired employees, and their dependents by each governmental entity’s post-employment benefit plans, if any. Such rights and privileges shall be governed by the terms of the governmental entity’s benefit plans, if any. This chapter is not intended to assure or deny any existing or future employee, retired employee, any of their dependents, or any other person of any right of employment or entitlement to any post-employment benefit or limit or otherwise restrict the ability of the governmental entity to modify or eliminate any existing or future benefit or post-employment benefit.