The sheer power of the American Institutions is so large now that continuation of American Sovereignty is out of the question for most of the world. A very small percentage of the world's population elect a US President who has vast and extraordinary influence over every other country in the world.
There is 'no representation' for the vast majority. So much for the vaunted supposed philosophical origins underpinning US Sovereignty.
The Financial aspect is but one. The military aspect is another. The last Great Empire (Britain) worked on a 'Two Navy Dictum' - that is, it's naval power was always to be the equivalent of the next two most powerful navies - but America now has a military that is more powerful than all the rest of the world combined, times three, and not just at sea but on land, in the air, in space, and Intel.
In its financial sphere, the article above omits a two crucial points.
It matters little whether a 'Private' Fed runs the finance system or the Congress does. The key point is that it dominates the world's financial systems and the rest of the world has no say at all.
It also omits the clear fact that the whole American financial edifice is built on Credit/Debt. It cannot pay its way. It has leeched value out of the whole of the world's output by expropriating that value and future value for its own wasteful, present-day means.
America ought to be liquidated as a Nation. Nothing is 'too big to fail'.