Investing 100's of millions into a parallel system that won't yield much until a good portion of your future retirees are in it (and all 50 diferrent federal ag

Investing 100's of millions into a parallel system that won't yield much until a good portion of your future retirees are in it (and all 50 diferrent federal agencies records are integrated in) is a hard sell in any universe. In the meantime, that system will obsolesce in 5 years and you'll have to redo it all again.