Norbert,
Yeah, that makes some sense.
The whole "there was a war and after it there was a massive depression" still doesn't ring true though.
I've never seen historically a case where after a war a massive depression occurred. Even countries in complete shambles (and remember, GTVA was not "in shambles" except for Capella) do not experience "depression". They experience a massive recession in GDP output in that precise moment, and then there's this massive recovery happening (especially if you have millions of Capella people entering the rest of the economy).
One could argue that the military build up was necessary to prevent hundreds of millions of refugees' resources to be wasted in slams, unemployment, and poverty camps...
@headdie,
Thing is, under a Keynesian viewpoint that assessment is irrelevant. Let's put some imaginary numbers to help us out debating this further.
Imagine that before Capella, the total GDP output of the human side of the GTVA was 10.000 gazilladollars. After Capella, it went down to 7.000 gazilladollars, massive social issues, violence up the charts and so on.
Now imagine that you, to work out all these social problems, unemployment and give the people a vision to hope for you decide to build the Sol Gate. This creates employment, social peace, stability in the face of chaos. This project takes a massive 2.000 gazilladollars per year. That's 28% of the economy right there. I'm probably exagerating here, this figure is ludicrous, but let's have it.
Now, you are absolutely right saying "Now imagine this 28%, when the gate is finished, wiped out from the economy, we have the problem again". No, because the economy starts to inflate and expand. 18 years with a 5% increase in nominal gazilladollars (I would imagine a far more speedy recovery but let's have this small number instead), you'll end up with an economy worth 17.000 gazilladollars. The percentage of the sol jump gate is now much lower in its percentage (11%).
You don't have to destroy it entirely too. You can do what the british did post world war 2: start the NHS.