Not all big government systems fail. Ever tracked a package with the US Postal Service? As a government employee, I led the design and implementation of the first tracking system. We had an impossible schedule, and beat it. In one year we went from the start of requirements gathering, through design, development, building out a data center, setting up a 1-800 call center, testing, deployment to 20,000 locations, and training 24,000 employees to use it. We finished a month ahead of schedule, and more than one million dollars under budget on a $180M project. Did you notice the press coverage, probably not, because there was none. The PM of the computer company hired to build the computer system used got a $20K bonus and a promotion to VP. I got a $1000 bonus and a signed plaque. No raise, no promotion. Guess why I don't work there anymore? The thing that kills the federal government on big projects is not that senior leaders don't get punished for failure, it is that the worker bees don't get rewarded for success. The civil service bases pay almost exclusively on seniority, raises are earned by sitting in a chair and not getting fired. Promotions are completely detached from performance. It is actually illegal to give a person a promotion to reward them for success. When senior positions become available, they must be opened up to all interested parties, and the selection is based on multiple irrelevant criteria, of which competence and diligence are almost insignificant. And the root cause is that the agency gets the same money from Congress, whether they perform or not. Without the cruel masters of profit and loss to filter out the weak and the stupid, federal agencies(and the military) become safe havens for them to congregate in.
I have a radical idea on how to fix this - do the federal budget by direct democracy. Each year let every citizen choose how much of their tax dollars go to what agency. Then disband the OPM and OMB.
There would be a lot of whining and complaining for a few years, but bringing consumer choice and free market forces in to the federal arena would fix a LOT of problems. AND it would prevent demagogues from buying votes with stolen money.