an honest broker
An unbiased or objective mediator. We can't have your mother decide this for us—we need an honest broker.
an honest broker
a disinterested intermediary or mediator. This expression is a translation of the German ehrlicher Makler . In a speech in 1878 the German statesman Bismarck ( 1815–98 ) recommended adopting this role in peace-making, and the phrase became one of his sobriquets.