This toilet paper is less and saving money on toilet paper and more about saving money on plumbing.

The nice multiply, soft booty hole paper doesn't break down as easily in the pipe. In your house this isn't always a problem, there are few people shitting and wiping there, and the distance to the street is relatively small. It can be a problem, if you're a heavy wiper on an old house using Charmin, but most of the time it's a non issue.

In an office building it's a different story. Hundreds of people on multiple floors, with someone practically always shitting. And the cost to even call a plumber to an office building starts at 4 figures for a cheap visit, with the affected stall down for days. If the entire bathroom isn't closed.

So, yes, the 1/3rd ply paper sucks, it's absolutely about saving money, just not on the paper.