Keane said: "Andy Reid has as much quality as any player but he doesn't deserve to be in the Ireland squad at this moment in time, as he's not doing enough. I think Reidy could be fitter.
"Trapattoni is an experienced manager, he looks at the players who are in form and are playing week-in, week-out, not once every four weeks and it's not as if Ireland are having bad results.
"I think the likes of Reidy, Carsley and one or two others, I don't think they've too much to complain about to be honest with you.
"Trapattoni has got more experience of us put together in terms of football. I wouldn't dare question what he's doing with the players he's selected. I look at one or two players who are playing on past reputation, one or two have not kicked a ball three years.
"This idea of picking players on form, I'm in favour of it; (Fabio) Capello does it.
"When it comes to picking players, there's a fine line between loyalty and stupidity. One Irish player in particular hasn't kicked a ball in three years and seems to play every time he's come over. I can't work that one out."