Okay, here’s an analogy. I kind of doubt it will help, but it’s worth a shot since curlcoat only seems able to think in household terms.
You are thinking of a budget as “I am making $X a month. Whatever I buy each month has to fall under $X.” You are attempting to apply that model to the nation.
There is a different situation, however, that is not uncommon and that applies much more closely.
Picture a house jointly owned by several friends/roommates. To make expenses easier, they have determined those things that are commonly used by everyone and that everyone or a majority want. This can include such things as the house payment, household maintenance, and supplies, groceries, utilities, cable internet/TV, and common-area furnishings such as a couch and TV for the living room.
The costs of all of these things are pooled together, and it’s determined that each person will need to contribute $X a month in order to pay for everything. Well and good. Except that when it comes time to chip in, some roommates don’t pay, either because they can’t or won’t. Maybe one pays their share of the house payment but nothing else and threatens to leave if the others ask for more. The ones who can’t would like to, but you can’t get blood from a stone, and besides they’re your friends and you don’t want to kick them out unnecessarily.
As a result, the revenue for the common expenses is below what was spent. They have to borrow on a credit card to meet the monthly expenses. Talk is made of cutting expenses, but every single possible expense is defended by someone in the house (“I NEED that 50” TV! It’s the only entertainment I have!" “We can’t get rid of the internet, I work from home!”), or the only concessions made are insignificant (“Yeah, we can buy store brand canned vegetables instead of name brand. That’ll save us $10 a month”). So if you can’t cut the expenses, then someone has to step up and pay more. Hopefully it’s the people who’ve been holding out that finally pay in their share, but someone has to, or else that credit card is just going to have more and more money put on it. And once you hit that limit on the credit card, well, either you need to raise the limit or open a new line of credit, and if that’s when people start saying you can’t put more money on the card, then everyone is going to be hungry and homeless in a hurry.
Sure, in that analogy you can claim that you’d just kick the deadbeats out of the house, and certainly on that scale it’s much, much easier to handle expenses. But when you scale that situation up to where you’re talking about several hundred million roommates, or even just 50 different roommates, and there’s nowhere for them to actually go if they can’t or won’t pay, that argument gets a whole hell of a lot harder.