One problem with pay-as-you-go systems is the availability of workers paying into the system. In workers contributed for each retired person; however, today only workers contribute per retired person. 1960, 2.1; 2.8 5:1; 2.1 O2.8; 2.1 5.1; 2.8

One problem with pay-as-you-go systems is the availability of workers paying into the system. In 1960 . workers contributed for each retired person: however, today only workers contribute per retired person. 2.1; 2.8 5.1: 2.1 2.8;2.1 5:1;28