Middle ground on what? Libertarians love charity. You should give until it hurts. I just don't believe in forcing you to give, and I don't think you should force me to give. Maybe I'm stuck in "treat others the way you want to be treated" mode. Do you have a better principle? How much welfare is enough? What's the objective? How is it measured?
Edit: I don't mean to sound like I'm attacking you, just genuinely curious about your first principles.
Edit: I don't mean to sound like I'm attacking you, just genuinely curious about your first principles.