C3H8 cooker, That's a pretty good post that hits most of the high spots. You are right about expenses being out of sight to accomplish what critics claim they must do. The censusing (nevermind experimentation) of wildlife is enormously expensive and produces, at best, estimates with large to gigantic error bars. Sometimes, the best surveying can be Fords and Chevy bumpers, sometimes it is hunter success rates (per season, or per hunter-day, or some combination thereof). For small game, generally there simply is no censusing at all. Squirrels and rabbits generally don't get counted except if it is convenient to do while counting something else that matters (e.g., roadside surveys for pheasants in Iowa include rabbit counts).
For all the doom, gloom and negativity dumped on modern management methods, just turn around and look at the success rates of game management. It is, frankly, astounding! To steal a phrase, that so much has been done to bring back game and nongame animals from exceedingly low numbers in the early and mid 20th century to what they are today is beyond words incredible. Deer were absent in much of the Midwest, they are now a nuisance. Canada geese are much the same. Turkeys are not far behind. Furbearers like otters, fishers, martens, bobcats are being re-introduced over much of their range with very good to excellent success. Alligators, grizzly bears, wolves were endangered species and now have become huntable game animals.
Personally, I would love to see the days when herds of squirrels roamed Middle and Eastern USA, but that may take a while. In the meantime, we have a lot to thank game managers for. And everyday they do it while being beat up on all sides and with about 3 nickels in their expense accounts.
There are some big concerns to be aware of for wildlife, but they are not caused by or being ignored by wildlife managers, so much as they may finally succeed in overwhelming managers who are basically being disarmed everyday in on form or another.
Say what you want about them, but if every other profession could do as much with as little financial, public, and political support, this would be one heck of a lot better world.