Many self-describe as "socially liberal and fiscally conservative." But, what does that really mean? According to wikipedia, fiscal conservatism advocates avoiding deficit spending, the reduction of government spending, and balancing the budget.
Regardless of the size of government you believe to be appropriate, most agree with these principles. It's hard to advocate spending beyond the government's means. It's hard to advocate spending more than absolutely necessary on government programs. And, it's hard to advocate that an unbalanced budget is preferable.
Usually, disagreements about fiscal issues are over the appropriate scope of government programs, not whether government should spend tax payer dollars wisely.
I object to those in favor of lower taxation co-opting the term "fiscal conservative" to mean lower taxation. Instead of talking about whether people are fiscal conservatives, ask about their views on taxation and the size of government.