If this is intended as a question about existing political clusters, then I think you should merge the "Liberal" and "Socialist" options; I don't think people see them as separate positions (at least in my country) in the same way as Conservative/Libertarian.

If this is really just a question about the left-right economic axis, then let's make it one, viz:

"Which of the following most closely describes your position on economic freedom vs. wealth redistribution?"

• Extreme economic liberal, e.g. US Libertarian Party: minimal/no taxes, no redistribution of wealth
• Moderate economic liberal, e.g. US Republican Party or UK Tories: low taxes, low redistribution of wealth
• Moderate economic progressive, e.g. US Democrats or UK Labour party: high taxes, high redistribution of wealth
• Extreme economic progressive, e.g. (I don't know, UK Lib Dem?): high taxes, major redistribution of wealth