Sometimes though, it is enough just to criticise. Sometimes it's someone else's job to make things right and to listen to other people who may not be able to spend the time and effort on getting stuck in and doing it themselves. Sometimes that person isn't even capable of joining in, due to factors outside their control (it's a closed insular corporation for example).

And sometimes, the people dealing with the problem are only taking the approach that they're taking because they're tackling the problem from within a particular organisation that has its own related set of problems that affect its take on the solution. And in such cases, the best solution is sometimes not the one that's open to that organisation, so they take a different (less good) path. The best solution may even be one that destroys the organisation involved, and it may be really obvious.

If nobody is allowed to criticise anything that they're not actively involved in trying to fix, the world would be a very boring place (and Government would have a very easy job).