17 Adar (ki sisa)

The shkalim are a kaparah for the golden calf. How does it make sense that for such tremendously wealthy people (they just got the vast majority of Egypt's money) that they could just give a little money and be forgiven? First of all, this paltry sum meant nothing to them. Also you can't just buy Hashem, this isn't Christianity! You have to do a real teshuvah! Why should their giving of the half shekel be enough?