How to foster ideological pluralism in teaching?
How refreshing to see someone who recognizes a spectrum of ideas and wants to teach it!

Science in general and economics in particular could be said to revolve around observation of phenomena, theorizing about causes, and research to verify or falsify the theory.

Try addressing topics in this framework: Here's the phenomenon, here are some of the theories to explain it, and here is some research on it which supports / refutes particular theories.  This will provide a model for your students to learn the subject without descending into rote recitation of the professor's favorite dogma.