I know there are legitimate barter organizations out there. Not sure what the difference between the Liberty Dollar version is, though I assume it was to similar to actual currency. But I would look at it more like a certified check, since it represents a supply of metal.
As far as the savings rate, America actually has a very high savings rate, if you don’t take the faulty government data at face value. They only include money that goes into savings accounts. If it goes into you 401K, a mutual fund, real estate, or even bonds, it does not count. (Not even sure they include money market mutual funds.) Intelligent investors really do not want their money in savings accounts.
Generally it is also recommended that people do not invest in gold, but if a person was interested in gold to invest in gold mining stocks. A rise in price will benefit you, while if gold drops, the stock still produces an income. Gold does not.
I cannot see us changing back to a gold backed dollar. Just the announcement would cause gold to jump, and then America would have to buy all the gold necessary, and at a high. Once the purchase was made, demand would stabilize, and gold would plummet. Meaning the dollar would plunge.
This also kind of ignores the fact that banks also make money. At least on paper. (Or more accurately digitally.) If what I read is accurate, and still true, a bank is allowed to lend $10 for every $1 they take in. So if they take in $1 million, they can loan out $10 million. That means potentially 9 out of every 10 dollars would still not be backed by gold.
Too often when people think of the uber-wealthy, like a billionaire, they assume they have a checking account with $1,000,000,000 written in their checkbook. But as I stated before, the intelligent investor generally avoids cash. Most of their wealth is locked up in investments. By doing this it is less important what happens to the dollar, because these people do not have dollars. (Although it will influence the American to foreign stock ratio they own, if they own stocks.)
The government does not want a gold backed dollar, because then they do not control its value. Right now they can decide to increase its value, or decrease its value. This gives them more power over the economy. A strong dollar means we can buy more in the world market, and a weak dollar means other countries are more likely to buy American goods, while Americans are less likely to buy foreign goods.
It seems to make sense to back a dollar with gold because a dollar is simply decreed to have value. The problem nobody seems to realize is that the same is true of gold. It only has value because we say it does.
What happens if somebody finds a super massive vein of gold? Or what if people figure out how to make it out of lead. (Actually this has been done through nuclear transmutation. Once was accidentally done in 1972 in the former USSR.) We have already succeeded in making diamonds normally worth $10,000 for just $5. Although the only reason diamonds are worth what they are is because of the tight control over the supply.