Does it matter? After all, world governments owe the money to their own citizens, not to the Martians. But the rising total is important for two reasons. First, when debt rises faster than economic output (as it has been doing in recent years), higher government debt implies more state interference in the economy and higher taxes in the future. Second, debt must be rolled over at regular intervals. This creates a recurring popularity test for individual governments, rather as reality TV show contestants face a public phone vote every week. Fail that vote, as various euro-zone governments have done, and the country (and its neighbours) can be plunged into crisis.
Gee Ed is our Prime Minister not an economist? As one of the elite why is he wasting taxpayer dollars, to the tune of 78 miilion dollars, on self promotion for his failed "Action Plan"?
http://www.economist.com/content/global_debt_clock
EB