Muin Ali, the multi-level England founder, expects more players to retire from some formats due to the busy schedule.
Test captain Ben Stokes resigned from international one-day play in July, while he and England teammate Jonny Birstow opted to miss out on The Hundred.
“Right now, this is not sustainable,” said Moin, who retired from Test cricket last year.
Moeen, 35, is concerned that 50-plus-year-old cricket could disappear amid the growing dominance of the Twenty20.
Speaking after his team Birmingham Phoenix Lost to Trent Rockets On The Hundred on Saturday, he said, “Something has to be done because I’m afraid I’m going to lose my over-50 figure in a couple of years because it almost looks like a tall and boring figure. There’s no importance given to it at the moment.”
“International cricket in all three formats is the best cricket by far, but I am concerned that there are many tournaments where players are retiring more now – and you will see more retirees soon – due to overlapping schedules.”
The calendar has become more crowded in recent years due to an increase in global events and the emergence of more T20 franchise competitions around the world as well as The Hundred in England and Wales.
The 50+ One Day Cup is currently being contested by counties that lost many players participating in the hundreds.
Indian bowler Ravichandran Ashwin recently questioned the long-term survival of the 50-plus-year game and said he No longer watching matches over 50 on TV.
The 31-year-old Stokes announced his retirement from ODI, saying: “There is a lot of cricket that people are shocked to play all three formats now.”
The chief executive of the Cricket Board of England and Wales, Claire Connor, told BBC Sport this week that Stokes’ message had arrived. Heard “absolutely”.
“It’s something we have to deal with – we are with other players and boards, the International Cricket Council and the Professional Cricketers Association,” she said.