The phrase "shrinking pie" means that the available resources or benefits are becoming less over time. It suggests that there is less to go around and everyone may have to settle for less. Full definition
The profession is more competitive than ever with more lawyers fighting for their slice of an ever shrinking pie. (lawyerist.com)
But it's an admittedly huge piece of an otherwise shrinking pie that market researchers estimate will generate $ 4.1 billion in software revenue and $ 3.1 billion in hardware revenue this year. (fortune.com)
Instead of growing the economic pie for everyone, green alarmists have literally shrunk the pie, impoverishing millions. (c3headlines.com)