Are you suggesting a similar regulatory regime for guns as for cars? Because that would be a great first step:
These rules may not swap 1:1 to gun manufacture and ownership. Cars are not manufactured or normally intended for use as weapons and while they can be, do not have the same characteristics that make firearms a better choice for that role. The question of the role of manufacturers is one that could probably be pursued to some success, but this pursuit is in an environment that is already regulation saturated. However, it seems a similar situation to manufacturers of products that are significant sources of pollution or have recycling capacity. The tobacco industry may be a model for some efforts. That still does not insure the success of the real goal. To me, the real goal is the reduction of the criminal use of firearms. That does not have to mean that the right to own them is infringed.
- no gun would be allowed to be manufactured unless it met stringent safety standards
I am assuming you mean standards that would be in place to minimize the illegal use of it and not the quality control mechanisms of manufacturing to ensure a reasonably safe product when used as recommended. I think those conditions do exist and are functioning reasonably well under normal supply and demand economics.
- every gun user would need a license
I can see every gun owner, but every user might be a bit much. There are ranges where you can rent guns. Having to get a license every time or even a blanket license just to use something a few times seems prohibitive. Though I can envision means to overcome that. Like the range be licensed and users operate under that license, but that might put undo liability on the range. Unfortunately, we could go back and forth on the minutia forever. We already have rules that disallow ownership and possession by certain classes of people like some mentally ill people and convicted criminals. So licensing does not seem on the face of it, unreasonable.
- every gun would be licensed and registered
I thought this was already done in many places. At least for handguns. I am going to have to review my basic laws it seems.
- every gun user would carry mandatory insurance
I am not sure how that would limit criminal use of the gun, but this benefit is offered in some fashion by the much vilified NRA. Not everything they do is pure evil.
- the police would literally hide in bushes watching people using guns, then jump out and charge them if they were breaking the law
No. No police state thank you. It is not even a good thing on the face of it. I think we could better use that resource in more practical and legal ways.
- huge amounts of government money would go into campaigns to reduce gun use
That is all of our money. Not all of us are going to want to spend it like that. There may be some reasonable ways to finance this, but just throwing more of our money at it without just cause is not one of those ways in my opinion. I would be open to the idea of presenting balanced, fact-based information to people so that they can decide for themselves. This may make them secure their weapons better. That would be a benefit.
- huge amounts of government money would go into stopping firearm deaths
I may be in on this, if the amount of money is used properly and is not so huge that it is disproportionate to what it would achieve. I would be hard pressed to say that the value of 20 first graders is so low that it would not be worth it to stop the death of even one more, but we should not break the beast of burdens back to save its legs either. That beast of burden being the American tax payer. The government is supposed to provide for the common defense and support the general welfare. This falls under that in my opinion.
I am not sure that the Constitution is as big a barrier to achieving some reasonable success at reducing gun crimes as is the barrier of the culture that subsists on guns. Some of this seems practical to a point and some is not practical at all. I still cannot see why review and support of existing laws should not be a big part of the solution. These government people work for us. Why not campaign to get them working on that. Maybe that is naive.