Erdal İnönü was deputy Prime Minister in the two coalition governments formed between center-right DYP and SHP, which were led by Demirel at first (from 1991 to 1993) and when Demirel became President, by Tansu Çiller, in a unity largely caused by their resentment at the time against the outgoing Motherland Party.
At the end of 1998, the corruption files about Yılmaz and Çiller were covered up at the commissions of the Parliament in a common action staged by DYP, ANAP and DSP MPs.