Example: All death penalties were commuted to monetary fines, except for pre-meditated murder.
Drunken and rebellious son was commuted to a fine.
Adultery was commuted to a fine.
Idolatry was commuted to a fine.
Sabbath violation was commuted to a fine.
... and so on.
"Eye for an eye" means NOT mutilation but the financial value of the lost eye.
There are very FEW legal issues in the Torah that were not modified by the Rabbis.