Tracking Pre-Tax Income?

I was looking at Reports, Cash Flow Sankey diagram and it got me thinking how it would be nice to be able to somehow include my pre-tax/W2 income so I could get the entire big picture of my income. I was wondering if anyone else had a similar desire and if there could be anything derived from it?

For example, it would be nice to understand how state and federal income tax affect my income, how much money goes to my health care (plan fee, HSA contributions), and 401k/Roth contributions. I am curious if the community has any input as to things that could be derived from this data - like perhaps optimizing retirement plans where state income tax doesn’t exist (and thus how much extra $ I could have), tracking HSA contributions versus actual spending?