The key to Western success, especially the U.S; is the lead the world in civil liberties, due process and equal application of justice. Debt and other concerns can be sustained as long as Western nations can say "we are NOT like THEM". Russia can stay afloat economically, the winner beyond economics will be ideology. This is where the steepest decline in the West has occurred.
Canadas police state (especially in legitimately broke Ontario) has essentially eliminated any Goodwill we once had. England has also damaged their reputation as a home country of civil liberties, though not nearly as steep as Ontaro has been damaged.
If America becomes a nation like Canada, it's debt, currency and other issues become FAR tougher to justify. Global citizens will say "you are not any different than the enemy states you call out".
The problem is that there are some who are fine, so they say "hey, who cares? Not my problem".
Not very patriotic nor far sighted and unless media applies pressure, the decline is inevitable