2 U.S.C. § 621 — Congressional declaration of purpose

to assure effective congressional control over the budgetary process;

to provide for the congressional determination each year of the appropriate level of Federal revenues and expenditures;

to provide a system of impoundment control;

to establish national budget priorities; and

to provide for the furnishing of information by the executive branch in a manner that will assist the Congress in discharging its duties.