This is a tough issue, because it's a slippery slope.
On one hand, there's the thought that an extra couple years isn't that big of a deal, especially when it's still only 60 years old to collect. But then what happens the next time? 65? Then 67? Then before you know it, we're 70 years old, before our pension kicks in.
The health of the funds is obviously of the utmost importance, and they can't go on with people collecting for so much longer than the years they actually paid in for, but there's a happy medium that can be reached that doesn't screw the membership and ensures that the fund is there for those of us who will collect decades into the future.