Complexity as an evolved defense against progress
Most parts of governments, religions, and many other parts of the world are far more complex than other ways things could be done that would work better.
If a government department is simple, more people would understand what is happening in it.
If more people understand what government is doing, more people would be able to have an opinion against it, and some would reduce support for or act against it. Those whose opinion would be positively influenced would do less than those whose opinion is negatively influenced.
Complex government departments breed other complex government departments. The more you have, the more there will be later, if few people resist.
Most people involved probably don't know they're doing it, but society evolved toward patterns where complex things survive because we don't have the brain power to understand them, which would be required to solve those problems. Complexity is a problem like AIDS. It spreads unnoticed for many years because its deep in the system (biology in this case) in ways its not easily observed, and being so well evolved with the system its hard to remove. It consumes resources to continue its own survival. It disables you just enough that its hard to fight back but little enough that you survive more years to spread it. Like we want a cure for AIDS, we should want a cure for Complexity.
Complexity is an evolved defense against progress, because progress includes many of the ways the world works, including some parts of governments and religions, becoming obsolete.
Complexity is a cost, not something to measure progress by. Something may need to be a certain level of complex to accomplish something else, but complexity by itself is negative and should be avoided like spending money. If something simpler or cheaper does the same job at least the same quality, then its a mistake to pay higher complexity or pay more of other resources.
People say things like "They spent billions of dollars researching it, and if they can't do it, why do you think you can?" Did they try spending only thousands of dollars researching it? With the ability to do complex things often comes the overlooking of simple things.
Similarly, why don't people say things like "If you want to build a system as advanced as animals or Humans, you've got to have AIDS in the system overall or something equally complex." Some parts we should not include in our world.
In open source, for example, we usually don't have the resources of a business, so we have to explore deeper into simple ways to make things work, so how are open source products staying competitive? We cure complexity because we have to. Others are still infected and allow their Complexity to refuse the cure which would obsolete itself.