Inflation adjustment doesn't take into account costs that are prevalent in an era but totally absent in another: like internet access, cellphone bills, and such. Nor how much one not puts into their retirement account / savings to spend on daily needs.
If it was just supposed to be relative to the past, we would all be content for living better off than the pilgrims. Who needs a fridge, for example, when they didn't have any either? So, if we have fridges now and stuff, and even the garbage man has a cellphone, it's all dandy.
Empirically, people older than you that have lived throughout those decades know the numbers a bogus as an indicator of purchasing power, whether they were inflation adjusted or not. One could buy a house with a regular blue collar job as a household's single earner back in the 50-60s. Today, and for a few decades, not so much. Same for things such as college education. You could pay for it back in the day by working laughable gigs by today's standards.
So whether you can have "avocados" or not, if you can't as easily have a house, an education, or a steady job, is a moot point.
Note how: "after adjusting for inflation, today’s average hourly wage has just about the same purchasing power as it did in 1979, following a long slide in the 1980s and early 1990s and bumpy, inconsistent growth since then. In fact, in real terms the average wage peaked more than 40 years ago: The $4.03-an-hour rate recorded in January 1973 has the same purchasing power as $22.41 would today".
http://www.pewresearch.org/fact-tank/2014/10/09/for-most-wor...