If Dr. Planned Parenthood himself won the election in 2004, legalized abortion on demand for all time, but balanced our federal budget and cut federal spending by abolishing our military, he would have accomplished your stated goal above of reducing the size and scope of government.
But it would NOT be conservative in any way, shape or form.
Thus, what you claim to want contrasts with who you say that you are: i.e. a "conservative."