Federal workers are not project-fungible in such a way as to make what you suggest possible. And it's not just the federal government, either; ask any large corporation. There is no path to "well the IRS's developers should just go make Login.gov happen faster", even if you get a hall pass from the mythical man-month.

So, now that we've acknowledged reality--what now? Do nothing, while the active harm continues, because of fear of a hypothetical future (but with a limited time horizon) one?