In a recent quote at TDWI (see article) I talked about how MDM can be the key driver for the data quality improvements.
Remembering my associative properties from math, it is not too far a reach to show that if CPM can drive the need for MDM and MDM can drive the need for DQ, then CPM drives the need for DQ. My thoughts are that whether the chicken or egg comes first, you must apply what business will understand as the driver. If it is compliance driven, let the DQ or MDM drive. If it is performance driven, let the CPM drive.
In the end a true CPM solution will have to have some flavor of both MDM and DQ.