Estimated Impact of Automatic Budget Enforcement Procedures Specified in the Budget Control Act
"The Budget Control Act of 2011 (enacted on August 2 as Public Law 112-25) made
several changes to federal programs and established budget enforcement mechanisms—including caps on future discretionary appropriations—that were estimated
to reduce federal budget deficits by a total of at least $2.1 trillion over the 2012–2021
period.

The caps on discretionary appropriations will decrease spending (including
debt-service costs) by an estimated $0.9 trillion during that period, compared with
what such spending would have been if annual appropriations had grown at the rate
of inflation. At least another $1.2 trillion in deficit reduction was anticipated from
provisions related to a newly established Congressional Joint Select Committee on
Deficit Reduction...