Franz,
The miscalculation in all this is that much of this cash goes back into the economy as "wages for americans".
This "it cost everyone 6,000" calculation reminds me of joke proofs that "there are no spare hours in a year".
It only has the full cost if all of that money is:
a: burnt
b: spent on overseas services
For example: The medical bills are keeping a doctor somewhere in a job. That guy buys a house, keeping a construction worker in a job. The construction worker buys food, keeping the farmer busy, and round and round the money goes. Much of it comes back in taxes.
fool