In an interview with Ezra Klein, Bernie Sanders says,
What right-wing people in this country would love is an open-border policy. Bring in all kinds of people, work for $2 or $3 an hour, that would be great for them. I don’t believe in that. I think we have to raise wages in this country, I think we have to do everything we can to create millions of jobs.
It’s true that we’re usually taught that if you increase the supply of labor, wages will go down. But, remember, that’s if we assume all else is equal. Famous left-wing economist Paul Krugman might disagree with that assumption.
In his famous work on trade theory — what won him the Nobel prize —, Krugman argues that a larger population implies a greater demand for goods, and therefore labor, because…you know…there’s more people. So what does this imply with regards to wages? If industries, or the economy as a whole through the division of labor, can benefit from economies of scales, it means lower prices and higher real wages.
So, if Bernie Sanders were really interested in raising incomes, he’d be an open borders advocate.