238.17 Employees of nonprofit professional association or corporation of teachers functioning on a statewide basis; intent.—It is the intent of this section to grant to employees of a nonprofit professional association or corporation of teachers who are or become members of the Teachers’ Retirement System all the rights, privileges, and benefits therefrom as are or may be granted to all other members of the Teachers’ Retirement System; however, for other than creditable service as a teacher as defined in s. 238.01(3) rendered to a state, county, municipality, or other taxing district by any such employee, the state shall not make any contributions on account of such service.