Not sure if you’re really curious but it’s because it means the US is going from using tax to sustain itself to borrowing money (hence the ballon of debt). When your government relies on borrowing money, the rich always win no matter how you slice it because typically, you borrow money from them somehow. This reliance is the beginning of oligarchy and bad policies that strongly favor the rich from this endless cycle of debt. It’s been true for any developed nations like Four Asian Tigers and been true for nations with strong historic roots like the UK. How do you think the British “royals” sustain themselves?