Tosh thinks something could be done to avoid having such big get togethers which he feels is making players make decisions they shouldn't ahve to make.
"I'm certainly not saying I advocate an overhaul of the way things are done, because I'm not," Toshack told the Western Mail.
"But what I would say is that it is something which does need to be debated by the powers that be.
"There was a time when, in Russia and Yugoslavia, we had two countries. Suddenly, there are 21 between them, 15 from the old Soviet Union and six from the old Yugoslavia.
"I remember playing World Cup qualifiers for Wales when only England and Poland were in our group. Four matches, that was it.
"These days we have huge groups with lots of travelling and games, which mean extended 10-day international get-togethers.
"There is an argument for saying we would be better off with more, but smaller, groups and thus less games.
"We've had a situation with Wales for a while where players have retired, which never used to happen in the past.
"But I've noticed it has also started to happen with other countries, too. I do think players in their thirties are beginning to wonder if they should go away for 10 days, when they know they are unlikely to play.
"Instead, for example, they realise they could go on a nice little break to Tenerife.
"As an international manager I don't accept people should quit. Once you've retired, you've retired. There is plenty of time, when you are older, to go on these holidays.
"However, let's say I can see the other viewpoint, with the way things stand."