Imagine that you're the kind of person who would never vote for a Libertarian Party candidate because they're too weird.
Imagine that you're either a big government Republican whose leaders want to spend lots of money blowing up mosques in the Middle East, or a big government Democrat whose leaders want to spend lots of money blowing up the economy in North America and to continue spending money blowing up mosques in the Middle East.
Pick one of the two. There's now very little difference, except the Democrats now have a much faster financial burn rate.
So....if you're a long-term supporter of either the big spending Daddy Party or the big spending Mommy Party, is it not downright immoral and hypocritical to claim any tax deductions? Don't you imply by your actions in the voting booth that government knows best? Do you experience any guilt for not giving them everything?