Responsible budget from congress.
Social Security / Medicare need to reduce benefits and increase taxation. Let's start with the easy one; social security taxes. Make every dollar of income be taxed for social security. If you make over $150k (pick a number, I don't care where it is), then 100% of your social security is taxed as income. Or maybe tax it a little more.
Cut the federal government. (mini-doge, for lack of a better term). Stop the growth in the budget of each department. Pull back 10%; done sanely by assessing what the department is doing, what it is required to do, and what it doesn't need to do.
Cut the military. Do we need both a land based and sea based nuclear deterrent? Get rid of 1 of them. Cut active duty strength 10%. Stop ridiculous projects like "B-52 Re-engine and Radar update". (So, I am going to put money into my 1950 ford, when I can buy a 2026 model (B21) at a reasonable price... this is absurd)
Raise taxes. Not a lot, but raise them. Bring in more revenue. You don't have to eat the rich, just reach a little deeper into their pockets. (also, I don't care how you define rich. Pick a number)
Do all of these in a moderate amount, and you will be OK. The yearly deficit will shrink, and some of the outstanding bonds will be paid. It doesn't have to be fixed in a year; a 20 year plan, executed, is fine.