My2Cents
I really am at a loss at how to even begin replying to your post. The truth of the matter is that were it not for the fact that you were quoting me almost line for line, I would not have realised that they were replies directed to me, as they have almost no relevance to the points I was making.
You talk about cash, when I was talking about transactions within the banking system and you also talk about the Fed materialising and dematerialising funds in banks which was something being argued by some other posters a page or so ago.
The key point of the US having achieved a smooth infrastructure for International Trade is the one point you agree with (Thank God) but then fail to appreciate what the consequences of this are.
A huge amount of global trade is conducted, denominated in dollars with the Oil and Gas being at the forefront of dollar usage. Well these Dollars are not given away, so the currency has to be bought and the only institutions able to supply sufficient are the major US banks that get them from the Fed. It really does not matter which banks nominally handle a transaction on behalf of a client as what appears in the clients bank account does not represent where actual monies actually exist and where they are actually held.
For example, when I buy HKD from Barclays to fund purchases from Hong Kong I have a UK HKD currency account that shows a balance of funds purchased (and charged a commission against) in HKD. I however know for a fact, that those nominal HK dollars do not exist in the vaults of my local Barclays. Instead I can only see them because they are credited to a Barclays Client Account opened by Barclays with the Hang Seng Bank of Hong Kong and that the actual money exists in a trade account of Hang Seng in Hong Kong itself and guaranteed by funds held in the vaults in Hong Kong. When I make a purchase from a Hong Kong supplier, a few nominal accounts make a few changes, and the value changes from my account to the supplier, who in all likelihood has a local account that is guaranteed by the very same funds in the very same vault in Hang Seng. Emails, phone calls, Goods and banking Instructions may have whizzed backwards and forwards across half the globe, but not one actual HKD has moved as much as an inch!
It is the same with the Oil and Gas transactions, but here as the scale is much greater, the Oil and Gas companies can open their own Account with a US Bank and buy dollars at a rate similar to that at which a national clearing bank can buy at. The value of funds may the transferred to a National Bank, but that National Bank will most likely hold the value within a Client Account it has opened with a US Bank. Likewise, when a Oil deal is transacted in dollars, the chances are high, irrespective of the actual banks co-ordinating the transaction, that the actual dollars are all within the US banking system and have not actually left the US. This is why so many countries that generate dollar surpluses are not content to simply allow these dollars to sit in an account, as they have no physical access to them and so "recycle" them back the US in return for T Bonds and other similar more tactile securities.
Letters of Credit are mechanisms or Instruments that are only as good as the Financial Infrastructure that they are operating within. They are not cash within themselves and only represent a guarantee from a bank along with instructions for the making of the transaction. Not every bank will accept letters of credit from any other bank. Letters drawn for banks dealing in dollars held within a US bank will have codes incorporated within them that will indicate that this is the case and that the receiving bank can accept the letter as valid more quickly.
Finally, Oil and Gas Trading is deadline and settlement driven business and anything that disrupts these schedules will damage confidence and good will. If the US wants to use its regulatory ability to disrupt another countries petrodollar Oil receipts it only needs to invoke anti terrorism or money laundering regulations to delay completion of payments or to freeze funds nominally held by a country like Iran. If payments are delayed by compliance/due diligence investigations, Iran would have to make a choice, either release the Oil before payment is received or even cleared and risk not being paid, or delay release and disrupt delivery schedules etc for which penalties will most certainly be payable to the customer. An even bigger risk for Iran on this score would be to have dollar funds frozen and find that just as happened in Libya, that they were being used to finance and arm opposition groups.
So my original points were.
1) The US benefits from High Oil and Gas prices as these dollars have to be bought from US banks for a commission and there will also be a variety of transaction and facility charges as a deal goes through.
2) That these dollars rarely if ever will leave the environs of the US banking system, as it is cheaper to keep them within it and also the only way to ensure the smooth progress of a transaction across International borders.
Finally of course, to appreciate the complexity of trading outside of the petrodollar, you only have to look at the efforts undertaken by China it internationalise the Yuan. Over the last decade, a vast proportion of its International Diplomacy worldwide has been visits by China's most senior leaders, accompanied by vast entourages of senior bankers and finance ministry officials as they try and negotiate the legal framework for direct currency transactions at Inter-Government, Inter-Bank and finaly at Corporate levels.
China, Russia and Iran are three of the countries at the forefront of using local currencies to transact Oil and Gas and it represents a substantial loss of income previously enjoyed by the US.