Jim DeMint, Senator from South Carolina from 2005 to 2013, when he quite the Senate in disgust over Washington's political gridlock, has written a very good piece in The Weekly Standard with Mike Needham : The Crony Capital. DeMint and Needham make the persuasive point that the reason conservatives aren't winning elections is not that they don't have an agenda that could appeal to voter, but that they don't actually do much effective about their agenda.
DeMint and Needham argue that most of the country, left, right and center, are fed up with the government's tendency to favor well-connected big businesses at the expense of everyone else, and if conservatives would actually DO SOMETHING effective about this they could win elections again. It is a well-written argument, and though from conservative writers the point is really relevant to the whole political spectrum.