Sorry to be so direct - this is a frankly terrible article.
The paraphrased sections are not directly cited, the quotations are extremely brief and general, and sources either are not given or only the general publication (without specifics) are given, no numbers or comparators are given. The site layout appears intentionally messy to make it harder to avoid ad or ad-placed articles. Overall this seems to be content as a pretext for ads.
For anyone clicking through because they would like to read something more thought-out, here’s an article I found by googling the name of the person quoted, which gives more details: fortune.com/…/how-did-us-spending-30-billion-doll…
This also is low on numbers, but here’s a link to Horvath’s testimony which appears to include comparator charts: …senate.gov/…/A19DF2E8-3C69-4193-A676-430CF0C83DC…