Answer: controlling the number of people who are eligible for benefits.
Step-by-step explanation:
An entitlement program is a federal program under the control of law and order of the government. It includes schemes and policies which are useful for citizens. These includes social security, pensions, veterans compensation, medical schemes, employment schemes and others.
The congress cannot reduce the cost of the entitlement by reducing the number of beneficiaries, who are actually eligible to obtain the facilities. This will be against political and social ethics.