Well, part of the problem is the USA wasn't planned out the same way as much of europe. Most people here live in housing neighborhoods 30 minutes or more by automobile to their employment, and 10 minutes or more by automobile to shopping. There is usually no way to travel by bicycle to these places either (bicycles are not allowed on highways). And public transportation in most cities and between most cities is either unavailable or not much coverage, or expensive.
Also, most americans are in debt up to their eyeballs and credit cards and housing loans are very nearly outright theft, yet we go along with it for a couple of generations now instead of helping our families build wealth (for example by living with family to save for a house after college (takes about 2-4 years) vs getting a loan with the bank and being "independent" of family (takes about 20-30 years to repay and many americans use credit cards and then refinance after several years into the home loan, and then the home loan basically starts over again- even without the refinancing to cover credit card debt, "normal" home loans mean you pay triple the money back to the bank that you borrowed over the 30 years).
So things here are strained and stressed from the past 40 years or so of economic culture and life culture including community planning and construction.
Our government believed big business and thought we could ship our manufacturing backbone out of country and everyone could get white collar jobs that require college degrees. Unfortunately if nobody is actually making something physical that can be traded for american money, then we can't afford to pay for the abstract white collar stuff. Heck now even many white collar jobs are outsourced to other countries - we can hardly call our credit card companies to find out how much more interest we are growing for them without someone in India picking up the phone to assist us on the other end of the line.
And then we had to start buying most of our stuff from clothing to construction materials to electronics to even food from foreign countries. We chose walmart and started shipping our money by the bucketful to China, never to be seen again as they intelligently keep that money in their own economy and build it. With cheap labor and factories built with foreign government subsidies making cost to big business even cheaper, meanwhile no penalty for selling those cheap subsidized goods in our market, so even if we still wanted to make some of these products here and try to build wealth, it would be impossible to produce it competitively.
It was very foolish anyway- manufacturing is what made us wealthy after ww2 when european manufacturing had been destroyed in the war and took years to build up again. It wasn't our cleverness that built our economy - it was the fact that we were the only modern manufacturing based economy left standing for years following ww2 and so we had a head start after the war. We added cleverness to that for great effect, true, but then the clever ones who understood the nature of the system they built retired and the next generation grew up in prosperity and thought money came about from magic and they took over control of the system and crashed it.
Cost of gas is a reflection of 2 factors-
instability in the middle east (follow the money- guess who will be making big money drilling for oil on american soil once gas gets expensive enough for us to all start begging the government to allow more native oil production?)
And value of our dollar (inflation). Which is going down the crapper fast because we have lost our manufacturing base and produce nothing physical of value that we can insist other nations buy using our dollars. Until now, we have been able to insist that oil all over the world is paid for with our dollars, which has kept us afloat for the past decade or so after trade agreements allowed our biggest employers to ship our manufacturing jobs out of country and not suffer penalties when shipping the products back in here for us to buy on credit. But soon the news tells us that our money will not be necessary for other countries to buy oil. Maybe chinese money or the euro- if that happens we are going to be in huge economic trouble because our money will become nearly worthless. On top of that we are talking about trying to inflate our way out of our national debt- very foolish and will double our trouble if world oil is purchased soon with some other currency.
I won't be surprised if we are soon paying what you guys in Germany are paying for gas.