The problem with FOI, and the approximate equivalent in the private sector, DPA/SAR requests, is that they are toothless. The ICON has no real incentive to pursue actions against those who do not comply is budgetary; they have a fixed budget and legal action has to come from that. If the Acts were amended to include punitive garages, for example (and this is a gross simplification) 10% of a companies revenues per action (and allowing for class actions), as well as costs, and those damages recovered allocated to the respondents including the ICO, then the ICO might have an incentive to take greater action.
In the case of FOI requests, it's a more difficult, any fine levied on a council is inevitably paid for by the local population. Holding a council executive responsible is not necessarily fair if the council cannot or will not make sufficient resources available to deal with FOI requests. But in the longer term, if the majority of information was publicly available to start with, and councils nationwide adopted a common strategy to publish that information in a manner that was searchable, then FOI offices in theory wou,d only have to deal with extraordinary requests. Want details of who tendered for which contract, and who was awarded it? Yep, it's online (after the fact), so tax payers can see the details. Want to see how many miles Councilor A claimed in 2012... yep, there it is. Want to know how many employees were terminated with an NDA clause... want to know how many Daimlers were hired to transport the Mayor...
Of course this will never happen, as councils are inherently secretive, just as secretive as central government and MPs.