The topic is whether minimum wage should be raised. I'm arguing no.What challenging questions can I ask my opponent, who is for raising it?

If the worker is granted an X% general raise, will he raise his productivity by X% ?

What about tax effect; and the loss of some tax credits (EIC, Obamacare subsidy, etc)

If everyone gets the socialist pay raise how will that help the individual's purchasing power? (it won't)

Will those who WORKED their way up be jealous of / resent the new workers that get hired at just a few pennies less than the experienced worker makes after all of his time on the job?

What if employers cut hours in an effort to keep prices down?

What will the employees do if the businessman decides it is cheaper to automate?

What if customers do not choose to pay the higher prices (but instead buy at the grocery store, or make at home)?

I think what you have to look into is what is exactly is he arguing for.

An across the country raise to $15 hour?

That's hard to support.

It might be a more than adequate wage in parts of Mississippi, but in places like Seattle it doesn't go that far.

What is the goal with minimum wage?

It used to be a chance for teenagers to gain some work experience.

Now it seems that it's supposed to support a person living on their own, or sometimes even a family.

Something is out of whack with the economy, it is unrealistic to expect that fast food restaurants and entry level retail jobs should fix this.

The reason you're having trouble is because you haven't done any research. You're not supposed to answer such questions off the top of your head. You're supposed to research: what happens when the head of a typically-sized family earns only minimum age; what happens to a community and to businesses when the minimum wage is raised; how much would the minimum wage have to be raised to make a significant difference in the family's ability to support itself; how much would the minimum wage have to be raised before it has an adverse affect on a business; when a business is forced to raise wages, what steps does a business take to compensate for the extra expense... and so on.

Do the research.