Your assertion that consumption has increased is compatible with Alexander's article if the quality of the product being consumed has decreased, e.g. people go

Your assertion that consumption has increased is compatible with Alexander's article if the quality of the product being consumed has decreased, e.g. people go to the doctor 20x more, but their health is worse than before. Or they go to school for 5 years extra on average, but are worse prepared for a job. In this scenario people are consuming more of an inferior product, and overall getting less utility/dollar spent. 50 years ago you paid $100 to a doctor and $80 of those dollars went towards giving you medical care, whereas now only $10 of those dollars go to giving you medical care. Back then only $20 went to 'overhead', but nowadays $90 goes to 'overhead'. By overhead I mean anything that is not directly germane to giving you care: administrative, taxes, insurance, lawyers, paperwork, even the $15 you spent on driving/parking to get to the hospital. The extra money is thus being destroyed by inefficiencies in the system. I made these numbers up to illustrate my point.