No. The group must be ready to deal with those who take and do not give, or it will not be sustainable.
Resources, protection, anything and everything.
First I would point out that the freeloader problem is hardly a sufficient concern to justify an immense, invalid, immoral institution of coercive violence. Government is responsible for hundreds of millions of deaths (Stalin alone probably killed 50 million under a constitution not wholly unlike our own: 1936 Soviet Constitution - Wikipedia). This is way, way more than would ever be possible in a free society, so I think we should weigh our concerns rationally before noting freeloaders as significant enough crisis to warrant this monstrosity.
Sure. Imagine no coercion in society. The first thing that would happen is we release all the criminals from the prisons, they join their fellow criminals in society, and they, since the cops are no more, then go on a murderous robbery and rape spree, until gunned down by angry mobs of victims.
THe mobs secure their neighborhoods, and place armed guards at their borders, and form communities to protect them selves and your "Free Society" fragments into thousands of communities willing to protect themselves, is a sea of barbarism.
In my rational opinion, that is reason to support having a government with it's police forces.
But even if we had no way of combating freeloading without government, consider how a free market operates... If a town wishes to build a bridge, it will solicit its people to voluntarily contribute toward that effort. Those who don't sufficiently want it may refuse to pay (being willing to risk not having it for the benefit of not paying for it), while those who deem it essential will be willing to absorb the cost of those who refuse to pay. If that demand is sufficiently compelling, the bridge will get built. The worst case scenario is that there will be no bridge; and since there wasn't one before, there's no loss, and no one was coerced by threat of violence,
Once built, what difference does it make if people who did not pay get to use it? The people who wanted it achieved their goal and get to use it. Even if freeloaders put wear and tear on the bridge and the time comes when it needs repair, the same scenario arises whereby the demand of those who wish to maintain the bridge will either be sufficient enough that they will be willing to pay for repairs, or it will not. This accurately reflects the strength of demand, be it a little among a lot of people, or a lot among few. Even if you don't put a toll and just choose to scowl at the people who don't pay, we have the peace of non-violence in any case, and the potential prosperity of the bridge.
And that would be the last time any significant investment in the community would be done. Because people do not want to spend their resources supporting those who take but give nothing back.
That community would immediately begin to decay. The economy would collapse due to lack of infrastructure.
Compare that to our current system whereby the bridge is built via taxation, which robs everyone under threat of violence to pay for it whether they want it or not. Then a portion of that money goes toward limousines, "business lunches", and a salary for the politician, who grants the contract to his brother-in-law for three times the fair market value of a bridge. The brother-in-law's company is getting paid no matter what, and having no accountability to the customer, his guys take 2 hour lunches, go home at 3 o'clock, and the bridge takes twice as long to get built. Then a toll is put on the bridge indefinitely which everyone must pay, even if they already paid to have it built. And of course, we have the issue of this institution doing a million and one other corrupt and immoral things while we justify its existence by citing our need for bridges and freeloader control.
Our current political class is completely corrupt and incompetent. THis is a failing of our political class and does need to be dealt with.
But it is a problem of our current leadership, not a demonstration that the idea of nations is flawed.
It's really just a matter of weighing our values. The innocent dead in Iraq are real people, just like you and me.They woke up one morning and saw the death of their children that afternoon. You and I are complicit in this if we support the institution that committed the act. The fact that we "don't like it" is irrelevant if we continue to support the overall system with our words and our votes, regardless of who those votes are for. The robbery of 300 million people to pay for it is immoral and not in keeping with our true values, as we would never rob someone directly, but condone it when done by proxy. Lies are required to gain our compliance, and on some level we all know it's not to defend anyone's freedom. And this is just one of a million immoralities that are born of governmental authority, never mind the fact that it has no valid basis to begin with; as it claims to derive its power from "the people" while none of "the people" have such rights individually (to tax each other, to make law for each other, to kill each other outside the scope of self-defense), such that they may delegate those rights to others.
We need a serious reality check about what we've been made to believe concerning the legitimacy, morality, and necessity of governmental authority as an overall concept; as no amount of well-meaning efforts to make it work better can change its inherent nature.
Groups clash and fight. This is a part of human nature.
It is not in our values to disarm and allow our enemies to wage war on us and not fight back.