Why is the individual income tax revenue important to compare to interest costs? Total interest cost as a percent of total revenue seems like a more holistic c

Why is the individual income tax revenue important to compare to interest costs? Total interest cost as a percent of total revenue seems like a more holistic comparison, which is 15%. https://fiscaldata.treasury.gov/americas-finance-guide/federal-spending/ https://fiscaldata.treasury.gov/americas-finance-guide/feder...