The Aontú leader is calling on the GAA to drop its policy of cashless tickets for GAA grounds.
Peadar Tóibín says it is discriminating against some older people who are not comfortable buying tickets online.
Age Action have also called for the GAA to reconsider its cashless ticket system in order to help older supporters.
Taoiseach Leo Varadkar believes there should be "some provision" for cash payment at GAA games.
"I think that decisions on ticketing are ultimately a matter for the organisations concerned, but I do think there should be some provisions for cash.
"That's one of the things that came out in the report on the retail banking sector led by Minister Donohoe, that while we want to have electronic payments and make them the norm, and I think they are the norm now, that cash is still legal tender."
