I think they were thinking of Carlos Menem's "si hubiera dicho lo que iba a hacer, no me votaba nadie” , but AFAIK thats a misquote [1]

A more recent Argentinian president (Mauricio Macri) said a similar thing though: " If I had told them everything I was going to do, they would have voted to lock me up in an asylum" (Tl mine).

Original [2]: "Si les decía todo lo que iba a hacer, votaban por encerrarme en el manicomio"

[1]: https://www.infobae.com/sociedad/2023/11/12/si-decia-lo-que-...

[2] https://www.cronista.com/economia-politica/Macri-Si-les-deci...