I don't like those economics quotes either, here is why.
(1) Reagan has no credibility to comment on the national debt. 2004 Fiscal year interest expense on the debt was $321,566,323,971.29.
This debt was exacerbated by Reagan and both Bushes. Clinton inherited a debt and a deficit from the first Bush. He proceeded to pass a very reasonable tax increase, cut fedroll payrolls and judiciously control discretionary spending by the executive branch. Clinton was a moderate, and a very fiscally respnsible one (the term fiscally conservative is not well served by recent conservative presidents).
(2) Rush Limbaugh connects Reagan's tax cut which took effect in 1982 with 92 months of economic growth. The connection here is equally justified as the "Pirates vs. Global Warming" graph promoted by FSMism.
After Reagan's initial tax cut, he proceded to raise taxes several times. One erased a substantial portion of the initial cut and another was the largest corporate tax hike in US history.
One could just as easily argue that the 92 months of economic growth were caused by these tax hikes, of course, this would be just as wrong as Rush Limbaugh. Changes in the overall tax rate can "tune" economic output up or down, but they are not the underlying cause. Any exception to this will be an excesive case, ie, doubling the marginal tax rate would cause a recession.
(3) Ludwig von Mises subscribed to the Austrian school of economics which is not entirely accepted by the mainstream of conservative economics. This school is opposed by progressive economists on the basis of content and methods.
(4) Like Mises, Milton Friedman is a libertarian.
Your collection of conservative economics quotes would be better titled:
"Libertarian Economics quotes and Reagan/Limbaugh BS"
This site is almost as fun as the FSM site, but it is not PETA-friendly: