I consider myself libertarianish and I focus almost exclusively on policy and the application of moral principles. The thing is without principles you're just appealing to expediency and self-interest, and it's not just true of politics. Science relies on universal principles. Psychology, psychiatry, and medical practices are bound by universal ethical principles such as informed consent, beneficence, and confidentiality. Even the hard sciences rely on certain universal principles such as the law of parsimony and falsifiability. Anyone making empirical or ethical claims, which is inevitable in politics, has to start with a certain set of assumptions and first principles.

https://steemit.com/philosophy/@chirieleison/the-necessity-of-being-guided-by-princples

You also don't need to tax people's wages to fund public services like police. A land value tax would be much more efficient in generating revenue.