German politicians from all sides of the political spectrum are up in arms over comments by the CEO of industrial gas company Linde AG that Germany should consider exiting the euro.

Linde CEO Wolfgang Reitzle told the latest edition of Spiegel magazine that the impetus for crisis-hit countries in the euro zone to implement reforms will abate if the European Central Bank intervenes, and "if disciplining crisis countries isn't manageable, Germany has to leave."

Mr....