The phrase "policy mistake" refers to a decision made by a person or a group in power that turns out to be wrong or harmful. It suggests that the policy chosen was a wrong move or an error that had negative consequences. Full definition
We believe a combination of adverse shocks and policy mistakes comparable to those of the late 1960s and 1970s is very unlikely. (us.beyondbullsandbears.com)
Cramer said that, «one of the things we've seen over and over again is that they've made a series of policy mistakes which reveals them as no longer being invincible.» (thestreet.com)
«This is the biggest policy mistake that the [European Central Bank] has subscribed to.» (news-to-use.com)