An example of FOI having an effect?

From Scotland - BBC news MSP expenses claims 'tightened'

The Scottish Parliament is to tighten procedures for examining MSPs' expense claims.
It follows the publication of hundreds of taxi expense claims by Scottish Conservative leader David McLetchie. McLetchie charged some journeys to his former law firm to the Holyrood account but failed to specify a start and end point on some expense forms. A parliament spokesman said its new guidelines would ensure MSPs were not confused by the process. Full details of Mr McLetchie's claims have been published by Holyrood following a ruling by Freedom of Information Commissioner Kevin Dunion. "We will now tighten our examination procedures where officials will ensure that a clear destination is stated in every case and will advise members accordingly": Scottish Parliament spokesman. The Scottish Parliament Corporate Body (SPCB) had refused to give details of the journeys as it felt doing so could compromise his safety and security.