I'm not sure what you're trying to argue here?
All i said is nothing is gonna change because the american elite (Which includes people of all political views) failed their responsibilities.
Australian politicians went against something their core voters disagreed with (Read the OP) and followed their responsibility. Why can't american politicians?
Gun ownership is an issue that the 'American elite' typically do not support nearly as much as non-elites do. Guns aren't a luxury in America, and most wealthy coastal elites, those people who might make up the 1% or the top 10%, generally don't own guns. Lobbying organizations like the NRA are powerful, but they're powerful for different reasons compared to other lobbying organizations around health care, energy, and other industrial lobbies.
The reason the NRA is as powerful as they are really isn't because of money, it's because of voter mobilization. For instance, the energy lobby behind, say, Exxon-Mobil or Pharmaceutical companies spends hundreds of times more a year on lobbying than the NRA does, but for the most part, Big Pharma or Exxon-Mobil really aren't motivating voters like how say, the NRA, NARAL, or other 'issues' lobbying organizations can. There are very few voters who identify with lobbyist groups for ExxonMobil, but there are many more voters who strongly identify with the NRA, enough so that the NRA grades candidates and many voters vote along those grades... Politicians in rural, conservative, uneducated areas often champion getting "A+" from the NRA as a badge of honor.
Unlike energy or financial reform, where wealthy elites really can be pinpointed with a lionshare of the blame, the gun issue in the US is an issue for the rural, largely poor or middle class majority. Owning a gun is not something reserved for the wealthy in the US. The highest percentage of gun ownership are in households with an income bracket between $60-90,000/year, which is squarely in the middle class.
Beyond that, gun owners tend to be less educated, they tend to live in the South and Midwest, they tend to be overwhelmingly rural, they tend to be older. By and large, gun owners and advocates tend to
not be the elite, and the elite are generally more averse to guns than middle class, rural, uneducated people are.
From Pew: The Demographics of Gun Ownership
Make no doubt, this isn't to say that the Legislature has not completely failed at legislating guns and protecting the general public from mass murder caused by guns -- they have. But, well for one, the legislature isn't necessarily "elite," sure, there are many people in the highest income brackets in state and federal legislature, but it's not an elite institution like other government institutions are, and as far as guns are concerned, gun ownership and advocacy is very much a rural, middle class, white populist platform.
The problem is it won't have any effect until it's nationwide due to the flow of guns from states with lax laws to those with strict ones..
I disagree with this. Gradually ramping up gun laws state-by-state can reduce overall gun violence state-by-state. Yes, people will still be able to access guns, but when states make something prohibitively more difficult, then it does effectively cut down on that thing. A recent example is with conservative states who have issued near de facto bans on abortion by making it prohibitively difficult for abortion clinics to open or stay open in those states. While neighboring states and regions still have ready access to abortion, there end up being fewer abortions in those states and more births from "unwanted" pregnancies. This is why pro choice advocates fight so hard for abortion rights in those states, because even while it might be readily available elsewhere -- even in relatively near by states -- de facto bans are consequential.
I think it's a copout to say that states shouldn't bother regulating guns because guns will be available from other states. I live in a relatively anti-gun state (MA), in a city that is very difficult to obtain fire arms, and fewer people per capita in my city own fire arms than other places around my state where licenses are easier to come by... Even though it would not be very hard to drive to NEw Hampshire or Vermont, or drive 8 hours to a southern state, and purchase a firearm (legally or illegally). The bigger issue at play is how local gun laws are interpreted by the Supreme Court. DC's "handgun ban" overrule by SCOTUS from some years ago had a chilling affect on new local gun regulation.