I think that every goal (personal or public) that contain a wealth cards are much easier to achieve, as you collect welth cards anyway. Player who got personal goal containing wealth has much easier game to win.
Do you have any ideas how to balance it?
What do you mean by "you collect welth cards anyway". Are you talking about yellow cards? They do not (usually) give you any ingame benefit, only points at the end of the game so points are the only reason to collect them if you don't have a goal card containing them.
If you feel, wealth goal cards are overpowered, you could try giving less points for them. E.g., a point for each pair (instead of single) wealth card in Collector or 3 points for each set of 3 (instead of 2) wealth cards and 1 CV card in Successful person.