However, you think it's stupid that the private sector committed one of the most massive thefts in history when we gave them more liberty a few years ago. Therefore, you think it's a good idea to give more people less control of their own money and give less people more control of other people's money. How does that make any sense? We're all fallible...therefore let's give a small group of people more control of other people's money?
It follows, then, that a less centralized society has the advantage of a greater diversification of its performance across a larger number of preceptors. This is because diversification here dilutes the impact of the ability, or the lack thereof, of each preceptor on the aggregate societal performance. - Raaj K. Sah, Fallibility in Human Organizations and Political Systems
Yet, you say that, "7 billion semi-independent priorities can waste resources almost as well as 1 bad mega-priority." But all the mega human-caused disasters throughout history beg to differ with you. Those were all mega priorities of blind men that failed to appreciate just how blind they were. We all have limited perspectives...which is why we shouldn't put all our eggs in one basket. Allowing 538 congresspeople to spend 1/4 of our nation's revenue is putting way too many eggs in one basket.
We're all going to disagree on things because we have different perspectives. But given that we all have different perspectives...allowing people to spend their taxes in the public sector automatically hedges our bets and promotes heterogeneous activity. Of course, it does make it less likely that we will be able to fund mega projects...but if you can't persuade enough taxpayers of the proposed mega benefits...then you have to acknowledge your limited perspective and accept that maybe they see other projects that offer greater benefits.
I clearly see the mega benefits of pragmatarianism...but if I can't show you the mega benefits...then I have to accept the fact that perhaps those benefits are just a figment of my imagination...which is why I wouldn't force you to spend your limited resources on something that could quite possibly be a mirage. So if you want to force other taxpayers to fund your projects...if you don't want to solely rely on persuasion...then you're just another blind man who thinks he can see.