The corruption of the German officer corps by the Nazi regime via generous bribes was a source of considerable disgust and exasperation to Goerdeler. One of Goerdeler's contacts with the Army, a Captain Hermann Kaiser informed Goerdeler that all of the senior officers were taking huge bribes from Hitler in exchange for their loyalty. By May 1943, Goerdeler was well aware that Field Marshal Günther von Kluge, General Heinz Guderian and Field Marshal Gerd von Rundstedt had accepted 250,000 "Reichmark" cheques as birthday presents from Hitler that were intended to bribe them into loyalty, and that in addition, Guderian had received an estate in Poland. Since these were all men that Goerdeler had hopes of recruiting, their refusal to join the conspiracy because of their greed for more bribes enraged Goerdeler. Goerdeler wrote with disgust in May 1943 that the senior officers "think only of helping themselves".