Gingrich vs. Ryan: Who Is Right?

We commented on the political aspects of Newt Gingrich’s criticism of Paul Ryan’s approach to reforming Medicare here, but what about the merits? Is the Ryan plan the best path forward for Medicare, assuming that we want that program to continue in some form?
This video by the Center for Freedom and Prosperity Foundation explains how the voucher approach can not only solve the fiscal crisis threatened by Medicare, but also significantly improve our health care system: