Within hours of the opinion polls suggesting a Sinn Féin political tsunami, the Irish business establishment was reacting. A strong of Irish listed companies say millions wiped off their market value. Brian Hayes, the former minister who now lobbies for the banks, was pointing out the difference between a ‘programme for government’ and election manifestos. Mark Cassidy, the Central Bank’s director of economics and statistics, suggested that the state’s economy was running almost at full capacity, noting any incoming government should avoid spending at a rate that would overheat it. Other voices too were warning about overreaction. Ibec’s Danny McCoy…