 Bismarck, forced for the first time into a situation he could not use to his advantage, wrote a blistering letter of resignation, decrying Wilhelm's interference in foreign and domestic policy, which was published only after Bismarck's death.Bismarck had sponsored landmark social security legislation, but by 1889–90, he had become disillusioned with the attitude of workers.In particular, he was opposed to wage increases, improving working conditions, and regulating labour relations.