Originally posted by Proteus
eyrei has posted already a really good Solution to the Corruption Problem.
Ongoing WLTK-Days seem to reduce Corruption even in totally corrupt Cities. My Empire with 70-80 Cities has only 1-4 totally Corrupt Cities to date, since I assurte every turn, that those Cities with much Corruption (i.e. also the totally corrput ones) fulfill the requirements for WLTK-Days.
It seems to be pretty sure, that it must have something to do with the WLTK-Days, cause before I tried this I already had enough wonders to make a large percentage of the Citizens happy, but I always had some unhappy workers in the Cities who prohibited WLTK-Days from taking place.
Only after I assured that WLTK-Days take place in totally corrupt cities the picture changed slowly as more and more of those cities (I had maybe 10-20 of them) became more productive (O.K. some of them still have only One Production, but their Value of 2 on Commerce shows that they aren´t totally corrupt anymore and I think, if I wait a couple of Turns Commerce and Production will rise higher).
But don´t expect the changes to take place over night. It seems to take a lot of turns with WLTK-Days to lower the Corruption in the totally corrupt cities.