Hilariously that wikipedia page mentions nothing about productivity. In fact an article that talks about Jevon's paradox says this:
According to the Ford Motor Company, its fuel economy ranged between thirteen and twenty-one miles per gallon. There are vehicles on the road today that do worse than that; have we really made so little progress in more than a hundred years? But focussing on miles per gallon is the wrong way to assess the environmental impact of cars. Far more revealing is to consider the productivity of driving. Today, in contrast to the early nineteen-hundreds, any American with a license can cheaply travel almost anywhere, in almost any weather, in extraordinary comfort; can drive for thousands of miles with no maintenance other than refuelling; can easily find gas, food, lodging, and just about anything else within a short distance of almost any road; and can order and eat meals without undoing a seat belt or turning off the ceiling-mounted DVD player.
A modern driver, in other words, gets vastly more benefit from a gallon of gasoline—makes far more economical use of fuel—than any Model T owner ever did. Yet motorists’ energy consumption has grown by mind-boggling amounts, and, as the productivity of driving has increased and the cost of getting around has fallen, the global market for cars has surged. (Two of the biggest road-building efforts in the history of the world are currently under way in India and China.) And developing small, inexpensive vehicles that get a hundred miles to the gallon would only exacerbate that trend. The problem with efficiency gains is that we inevitably reinvest them in additional consumption.[0]
In other words, you're too narrowly focusing on "miles per gallon", not the fact that "any American with a license can cheaply travel almost anywhere, in almost any weather, in extraordinary comfort; can drive for thousands of miles with no maintenance other than refuelling; can easily find gas, food, lodging, and just about anything else within a short distance of almost any road; and can order and eat meals without undoing a seat belt or turning off the ceiling-mounted DVD player."
For example, in the show Mad Men, you'd see a whole floor full of human beings who's sole job was to type out letters on typewriters. Now, those jobs are obsolete and the white collar worker is responsible for them. Still bullshit paperwork, but the white collar worker now has to do them.
The overall trend for productivity since it was tracked in 1947 has been on an upward trend with its sharpest 1H downward trend ever this past year. Are you seriously suggesting white collar workers magically got more bullshit paperwork just these past 2 quarters?
[0] - https://www.newyorker.com/magazine/2010/12/20/the-efficiency...