If you mean pension contributions, public servants have only three choices: - buy back years, AVC with the incumbent AVC provider (e.g. Cornmarket, Marsh etc.) or an AVC PRSA with their own choice of PRSA provider. Given that the first of these options doesn't allow the individual any choice, I presume you mean a Best Buys table of AVC PRSAs?
If I'm understanding your suggestion correctly, I think the existing thread Cheapest PRSA seems to cover this?