Question

what is one of the main reasons that congress should want to keep social security going?
it is morally right to support the elderly after they have worked hard all their lives
raising the retirement age means more people will want to work past 65 so that they can qualify for full benefits.
older americans tend to vote, and will show their support for social security by voting for congressional candidates who support it
rewatch

Explanation:

In the context of politics (a sub - field of Social Science), politicians (including those in Congress) are often influenced by voter behavior. Older Americans being a significant voting bloc and their tendency to vote for candidates who support Social Security is a political consideration. The moral argument is more of a philosophical (Arts - Philosophy) or ethical (Social Science - Ethics, which is under 'Others' in Social Science) stance but may not be as directly relevant to Congress's political self - interest. The statement about raising the retirement age is more of an economic (Business - Economics) or policy (Social Science - Public Administration) analysis but not the main political reason for Congress to support Social Security.

Answer:

Older Americans tend to vote, and will show their support for social security by voting for Congressional candidates who support it.