The legislature of the state of Washington has enacted a statute known as Chapter 184, Laws of 1951, as codified in RCW Chapter 41.48, which, in conjunction with the amendment of the Federal Social Security Act by the Congress of the United States, enables the political subdivisions of the state of Washington to take all action necessary of effectuate the coverage of their employees and officers under the federal old age and survivors’ insurance system. It is believed that protection of the Social Security System will greatly benefit the employees of the city, and also this municipality by attracting to it and enabling it to retain the best of personnel and thus increase the efficiency of its government. And it is deemed that the payment by the municipality of its portion of the cost of said system is a payment for a municipal purpose.