California startup to demonstrate space weapon on its own dime

I had to read this a few times to make sure I understood properly, but the Trump admin wants to spend a metric fuckton of money on a group of IoT systems that will keep space missiles pointed at basically every country on earth (including the US). Aside being the stuff of cartoon villains, once this is begun in earnest why on earth wouldn't every other nation do the same? And what's stop stop hackers from penetrating any one of the "system of systems" used to make this thing work and launch a missile or two?