Dan Mitchell is an economist and is widely read and commented on across the Conservative blogosphere; I have quoted his work a lot over the years. Well studied, clear writings, and often, good infographics. If you ever get the chance, search out his articles (there are MANY!) and settle in for a great read. He has worked at both the Cato Institute and the Heritage Foundation and is in much demand as a speaker.
His topic was about the existential threat by the rise of Government spending, the rise of dependency on Government, and the resulting loss of Freedom.
I am looking to get his PDF slides.