Earlier quoted context omitted.
You mean aside from the essentially unserious nature of his fiscal proposals, which promise to balance the budget by cutting both spending and revenue in such a way that the numbers don't come anywhere close to adding up?
Laffer Curve. Look it up. Even JFK understood it.
There is no plausible mechanism by which any versions of the Ryan plan we've seen can actually balance the books. It's nothing more than a generous gift to the country's most affluent taxpayers couched in hand-wavy ideological nonsense.