Yes I'm aware. I'm really talking more about the fiscally conservative thing, which people who are socially conservative rarely say. They usually just say, "I'm conservative."
The problem is that it's very easy to say "I'm fiscally conservative," because very few people in any position will just say, "Hey, let's be irresponsible with our money!!!" It's like saying, "I'm for peace on Earth and goodwill towards men!" There's no real definition of how to get there, but peace on Earth would be awfully nice, right? They usually want to be responsible with their money, but there are enough important things to spend that money on that they have no idea where to cut. It's exacerbated here, often, because people often have very little understanding of what's actually in the budget in the first place.
I guess it's just a phrase that's come to annoy me, because I used to use it myself, before I realized how vague and meaningless it was when confronted with other people that say the same thing and have completely different meanings.