If a sewer system can be designed such that dumping sewage need never occur, you can earmark some of the budget for gradually introducing this property into your sewer system. The more such improvements you make, the less often you'll have to dump sewage, until you never have to. Thames Water could have done this.

We already know that more things can be done, in a better way, etc., if given more resources, more time, better decision makers, etc.

That’s true for all organizations.