[EliRivers]

Could you point me to any source where it is calculated?

Here's one to play with http://www.measuringworth.com/ppoweruk/

I don't need it though. I have something in my hand right now that I could have sold for literally a million times as much only 60 years ago.

I can buy enough food for a year on a single weeks wages. Compare and contrast to an indentured peasant who worries if he's going to starve this year.

I can travel to the other side of the planet and come back. This is something I can purchase on about a week's wages. The cost to someone three hundred years ago to doing this was so much higher, and given that I can get there and back in less than 48 hours, it doesn't even begin to compare. My purchasing power (i.e. the things I can buy), compared to someone like me three hundred years ago, is so, so, so much more than a measly 400 times theirs.