Well, actually, I picture not an invasion but some kind of chaos if a worldwide disaster happens where we all lose electricity. The sun is perfectly capable of ejecting such a strong EMP burst that destroys all of the electronic devices on Earth. Given that most of us are on "life support" with electricity, unable to survive without it like growing food in our own backyard and gathering our own water, using gasoline at the gas pumps that cease to work without electricity, etc.. The thing is that since all of our $$$ is stored in the banks that have all of it computerized somewhere on a server, the one in power will be the one with GUNS.
Yes, GUNS, that is, as we all fight for food that we don't know how to grow or gather (with most of us being uneducated at raw survival skills).
The rich who have the most guns/ammo will retain their dominance in this possible catastrophe.
Else, some kind of a nuclear war could still wipe out the internet as we have it today. The un-prepared banks still lose their data (there's no reason for them to be prepared for this thing as nobody really expects it), and the arms determine the outcome. We need whatever defense we can gather in this fragile ecosphere.
The rich have bodyguards who will be too glad to take everything from them.
Silicon is too fragile. Why we do not *expect* that EMP blast is way the hell beyond me
- like the stupidity of putting the Japanese reactors on the coast and not planning for an inevitable tidal wave.