4) It doesn't work: A hammer is a good tool to use for pounding nails. It's not such a great tool to use in place of a screwdriver, saw or wrench. Government can be a good tool as well when it's used for the limited purposes for which it’s designed -- such as putting up street signs, building roads and forming a military to protect us from other nations. The problem with liberals is that they want to use their government hammer for every task imaginable instead of letting the free market provide the right tool for the job. You think a billing dispute with an insurance company is unpleasant? Wait until you're hashing it out with the IRS. You don't like to deal with your insurance company? Wait until you have a problem with your insurance and can't get it corrected until you get approval from a government agent. Our government is slow, stupid, arrogant and generally unfriendly to consumers. The more government you have in your life, the more unpleasant your life is likely to be.
5) There are no trade-offs: Liberals seem to be incapable of mentally comprehending trade-offs. So instead, they present Utopian visions of how life would look in a perfect world and offer that up as a political alternative to the messy, oftentimes unpleasant reality we live in. It would be fantastic if Santa Claus, Star Trek replicators, and genies were real, but when you seek heaven on earth, you're more likely to start wandering towards hell.