Final answer:
Congress uses its power of the purse to allocate funds to executive departments based on compliance and importance of work. Congressional hearings are held to review the activities and budgets of bureaucratic agencies.
Step-by-step explanation:
Congress uses its power of the purse to facilitate oversight of executive departments by controlling government spending. This power allows Congress to allocate more money to agencies that follow its directives and do important work, while cutting the budgets of agencies that do not comply. Additionally, Congress holds hearings to question the leaders of bureaucratic agencies and review their activities and budgets, providing an opportunity for oversight and accountability.