Aren't liberal economic views pro-regulation?
No. "Liberal" only means "left wing" in that sense in the 'states. Classical liberalism espoused, among other things, free-market capitalism.
Basically there are too goddamn many ideological divides to fit into one question. Here's a suggestion:
Economic Ideology: Set it on a 5-point scale from Full Free Market to Full Government Control. The spectrum between market and command economies is basically that once you strip away the fluff, and it avoids the issues of people meaning different things with the same words.
Political Ideology: You probably can't base this one on a five-point scale as well, but give options something along the lines of: Anarchist, Marxist, Anarcho-Syndicalist, Leninist, Stalinist, Maoist, Republican, Direct Democrat, Federalist, Socialist, Democratic Socialist, Monarchist, Theocrat, Technocrat, Plutocrat, Fascist, Absolutist Authoritarian, Imperialist....
Yeah, that's why it's fucking impossible to make an accurate metric in that vein, even without the bleedover into economic ideology. Here's a couple simpler questions: Government should be: As small as possible, filling as few functions as possible <-> As large as necessary to fulfill as many functions as it can; Not at all active in social, cultural, and moral matters <-> As active as possible in social, cultural, and moral matters; Should not provide any aide to its citizens <-> Should provide as much aide as possible to its citizens.
Or something like that. Socio-economic-political ideologies are both absolutely fascinating and an immense pain to work with, for much the same reasons. If you were really going to do these issues in a meaningful way, it'd be a multipage survey just for this stuff.