Sort your list by dollars saved divided by human-hours required to achieve, and add a column with likelihood of success after 2 years.
Yeah, "software subscriptions" is nowhere near the top. You lack a sense of scale.
Right. A couple hours to instantly save millions by looking at active vs purchased licences is barely worth the effort. Exactly what is the threshold where people with your perspective won’t handwave away explicit irrefutable waste and say “oh that? who cares it’s nothing”?
It's not principled to solve problems in stupid ways, it's actually just stupid.
Here's where someone who has thought about the problem for more than 5 seconds would likely start: gigantic healthcare organizations defrauding Medicare, in particular vertically integrated pay-viders.
Literally tens of billions of dollars per year in known, easily detectable fraud.