Good intentions are often claimed, but don't matter. People claim whatever they want (akin to proving a hypothesis by making up evidence). For example, someone promoting minimum wage increases will claim good intentions (wage increase) and ignore the undesireable effects (eg. it's well-established that the resulting churn turns some people out of work). Only outcomes matter.
The latest Democratic spending proposal, amounting to $3.5B or so, is so far only a number with no specifics attached. They mean well. No matter what else happens, they mean well.
But, to specifics: an intemperate populist was elected president, and his party won Congress. Contrary to the popular theories that Congress is broken or the Republican party is broken, two things didn't happen: Congress didn't blindly do what the intemperate populist wanted, and the Republican party didn't change the rules so that they could (in Congress) do what the intemperate populist wanted. The US structure of government moderates excess. In our parliamentary system, though, if an intemperate populist leads a party to a parliamentary majority...
That's not how I said it was broken.
It's broken because the system was built on compromise. Getting past a filibuster requires 60 votes in the Senate. That has been incredibly hard to get for decades now. So some from the other party would need to break party ranks and vote with the opposition, usually after a suitable middle ground could be found.
That no longer exists. Republicans will not vote with democrats and will not negotiate, democrats will not vote with Republicans and will not negotiate. There is no compromise. There is no way to get to 60 votes.
A system build on either compromise or a 60-40 split in the Senate has neither compromise or a 60-40 split in the senate is a broken system same way that vehicle that runs on either gas or diesel having neither gas or diesel is a broken vehicle.
How is stuff done in Washington to compensate for this? Executive orders, torn up as soon as a new president takes office. Or once a year, reconciliation, where since it only happens once a year, has to cram everything under the damn sun into it, because when else will a party get a chance to pass their agenda with a simple majority vote?
Trump tax cut? Reconciliation.
Biden stimulus plan? Reconciliation.
And since they need just a simple majority, they don't need to compromise, again, hurting the system built on compromise.
America was set up in a system where there were no parties, then loose parties, to hardliners parties with a few mavericks on each side willing to work across the aisle, to hardliners parties with no mavericks willing to work across the aisle.
This later development is what has broken the American system.