Executive branches contain a central office that assembles the budget and reviews what agencies propose to do. Its influence is procedural and considerable.
Budget assembly is a control mechanism
Agencies submit funding requests, and the central office decides what is forwarded to the legislature as the executive's proposal.
An agency cannot appeal to the legislature over that decision without breaching the norm that the executive presents a single position, so the internal ruling is close to final.
This gives the office leverage over every department annually, independent of the substantive merits of any particular program.
Regulatory review sits at the same choke point
In many systems, significant proposed rules pass through this office before publication, where they are checked for cost analysis, legal consistency and alignment with executive policy.
Review can result in changes, delays or a rule being withdrawn, and the process happens before the public sees any draft.
Supporters describe it as necessary coordination across an executive branch that would otherwise contradict itself. Critics describe it as an unaccountable veto exercised without a record.
Consistency is a genuine problem it solves
Agencies with overlapping jurisdiction can issue conflicting requirements, and firms subject to both then face rules that cannot simultaneously be satisfied.
A central reviewer catches those conflicts before publication, which no individual agency has the standing or the perspective to do.
The same function applies to legislative proposals, ensuring that departments do not send the legislature bills that contradict each other.
Its staff are largely permanent
Most analysts are career officials with long experience of particular program areas, which means institutional knowledge persists across changes of administration.
Political appointees set direction at the top, and the analytical work beneath them is conducted by people who have watched several administrations attempt similar things.
That continuity is the source of much of the office's practical authority, because an agency arguing for a programme is usually arguing with someone who reviewed the last three versions of it.
Transparency varies by system
Some regimes publish the changes made during review and log meetings with outside parties, which allows the process to be examined afterwards.
Others conduct it entirely internally, on the reasoning that pre-publication deliberation within an executive should remain confidential.
The disclosure rules are the main determinant of whether the office is understood as coordination or as a hidden stage of policymaking, and they are set by directive rather than legislation.