If you think Chicago School economics is centrist, then "centrist" is just another word for conservative.
Trump in fact acts contrary to most recommendations from Chicago economists, even though both are “conservative”.
Chicago School is the conservative view of economics, not the dominant view.
Leftists don’t generally like mainstream economics and subscribe to more niche segments. That’s ok - and there is a lot to criticize. But it’s also wrong that freakeconomics is peddling “conservative ideas” unless you do agree economics itself as an academic field is conservative coded.