The critics even made a point of ridiculing the party's name, saying the PP stood for "(Myanmar) People's Party".
Pheu Thai secretary-general Sorawong Thienthong pointed out earlier that Gen Pisal would remain an MP even if the party decided to expel him.
Pheu Thai might also believe that Gen Pisal quitting would spare Ms Paetongtarn from any ethics probe.
Another disappointment has been Justice Minister and Prachachat Party leader Pol Col Tawee Sodsong, who has kept silent, possibly to avoid coalition tension, Mr Olarn said.
In August, the court accepted the lawsuit against seven of them, including Gen Pisal, and threw out charges against the other two.

People's Party's popularity problem