How are social insurance programs affected by the socioeconomic and political forces?

The main social insurance programs like Social Security, Medicare, and unemployment compensation are funded by a payroll tax on the earnings of individuals who may receive benefits.

Do you think the social insurance programs are effective? How are social insurance programs affected by the socioeconomic and political forces? Explain your answers.

Respond to this question below as well in a separate paragraph:

There are real worries that Social Security is not sustainable for the long-term as it is presently setup, and one solution proposed to address this concern is to raise the age of eligibility.

(Greenberg and Page, 512-513) Should the age at which folks are eligible for Social Security be raised? If so, how come? If not, why not?