hello everyone, havent posted in a while because of civ3

. ok heres my question:
i have a huge empire compared to others, and my government is democracy (which says minimal corruption). right now, many ( and i mean a loooot) of my cities have only 1 shield (and the rest corupted shields) and one gold (... the rest corrupted), and i have no science produced.
is there any way to cure this problem?