Its true to an extent. We do have things and have to bear the cost of supporting things that did not exist in the 1970s. Its comparable though. Cellular phones are a perfect example. I no longer maintain a land line phone, I know lots of people do but they don't need to do so.
Even if I chose to keep my cellular as an additional luxury over the land line, its still not a major drive on my balance sheet. If you really look at things that suck up most of the money, its property taxes, property values, fuel for heating, and recently ( last decade; and ignoring previous short term spikes ) fuel for transportation, and groceries.
Also somethings like internet and phones, should offer savings as well. In terms of added efficiencies.
So while its not perfectly cut and dry; its still clearly the case something has drastically reduced the real value of labor, and that is the place to attack the problem.