Russia’s richest businessmen are increasingly frantic that President Vladimir Putin’s policies in Ukraine will lead to crippling sanctions and are too scared of reprisal to say so publicly, billionaires and analysts said. If Putin doesn’t move to end the war in Ukraine in the wake of last week’s downing of a Malaysia Air jet in rebel-held territory, he risks becoming an international outcast like Belarus’s Aleksandr Lukashenko, whom the U.S. famously labeled Europe’s last dictator, one Russian billionaire said on condition of anonymity.