With so talented a group as the Stasi who were able to worm their way (if
that's
what you call it) into a president's pants, one has to wonder how come the
government who employed them has disappeared from the face of the earth?

Simple,FRG intel services,unlike US,put every innocent looking flirtation of
FRG politicians and officals under the magnifying glass and many times the name
of Markus Wolf appeared behind these relations.
FRG was pretty succesfull in this regard.