Federal wire fraud (and conspiracy to commit the same) has a maximum sentence length of 20 years. I guess she could have gotten 80 years if all 4 convictions were ordered to be served consecutively. I don't know how common consecutive senteces are vs concurrent.
In federal prison you can only parole at a maximum the last 15% of sentence, so she well serve the majority of the time (if held up on appeal etc., etc.)
They were made by people with solid credentials in the legal field. My guess is that in the end they dropped a bunch of charges to levels that would skate under the multipliers, or she simply wasn't convicted on the ones that had big multipliers. But since I am not the lawyer, that is my non-credible speculation.
https://www.latimes.com/archives/la-xpm-1995-03-03-me-38444-...
Not to mention the years tens of thousands of people (mostly Black again) have gotten for smoking some joint, or much minor theft of 1/1000000 scale to Holmes.
Or immediate execution by some cop for just talking back, or merely walking about...
And societies who have them don't belong among civilized ones...