But then this does not the tell how long that 1-income person must work for the acquisition af a camera, and how long the european counterparts must to do for an equivilant camera.
Moreover this does not yet tell, if there is any effluent income to spent on a camera at all and if not war losses have to be reestablished first, or modern appliances as a refrigerator are top on the list and will block effluent income for a while.
Indeed, what you point out is true.
There are basic differences in how countries tax the same amount of income...a Swede once told me, "In Sweden the tax computation is very similar to yours in the US... first we pay 50% and
THEN on top of that we pay a similar incremental amount in tax like yours."
Also there are fundamental difference in the taxation of goods consumed...which accounts for why gasoline is relatively more expensive in Europe compared to US...the taxation imposed before gas goes into your tank. And things like the Value Added Tax at each step of the chain from manufacturer to you.
Adding to the complexity is that in the US, if you took home $100.00, some of that money went to pay for health insurance coverage (government only covers you here if you are 'poor'), wheras Germany has its socialized medicine funded by taxes taken out before it gets to your pocket, and private health policies are optional for Germans (at least I know it was that way 35 years ago).
This all makes it very hard to compare directly, which is why I made no attempt to compare discretionary incomes, after taxes and paying for housing, etc.
I merely pointed out the mean income in US in 1955 was modest, hoping to get comparative income values for Germany.
BTW for comparative costs, in 1955 in US a gallon of milk was $0.88, and a loaf of bread was $0.18, and a gallon of gasolne was $0.29. In Germany...?