单项选择题

A pension is the money that a worker or his or her family receives after a worker retires, is unable to work or dies. People have pension plans from working in private industry, in the armed forces or in the government. People can also establish their own pension plans. Many of those who create their own plans work for themselves or for a company that does not provide a pension plan. Reports say most American workers have some kind of pension plans. Most pensions of people who worked for the government are paid for with money that came jointly from workers and their agencies. Most private pension plans are paid for by the employer.
A federal (联邦的) government programme called Social Security provides money to most American workers after they retire. Social Security is the largest retirement programme in the United States. Workers pay into the programme percentage of what they earn each month. Their employers do the same. Most self-employed people also pay into Social Security. These people then will receive money each month after they retire for as long as they live.
People can also establish individual pension plans through banks or insurance companies. They put in so much money each month, then receive payments after they reach about sixty-five years of age.

Most pensions of government officials are generally paid for by（）

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