Any political system wich seeks to implement involuntary transfers must be based upon justification.
Any political system which seeks to implement voluntary transfers need not be based upon justification. But this is an INSUFFICIENT ANSWER to the problem.
This sounds quite simple. However, the first problem is not voluntary versus involuntary transfer, but the distribution of control between the monopoly of private (several) property, and the prohibition on monopoly of control under the shareholder relations of common property (the commons) – and the difficult means by which commons are privatized without the conduct of free riding, profiting from interference, profiting from fraud by omission, profit from fraud, profit from privatization of the commons, profiting from rent seeking, from organizing for the purpose of extraction (taxes) and corruption, takings and war. It is true that private property improves both incentives and calculation, and reduces the friction, but the problem is that even at that point, the system of property rights is in fact a shareholder agreement, and there are very different moral arguments over the distribution of the proceeds produced by the corporation and its members. This question is not trivial, especially with the introduction of women into the voting pool, since women’s biological moral code, demonstrated by their voting pattern, is by definition one of rent seeking and totalitarian equality. Their moral code is not ‘wrong’ for them. It is very wrong for productive males.
These problems are not trivial. And libertarianism’s argument that LIBERTY is a universal desire has been demonstrated to be false. CONSUMPTION has been demonstrated to be a universal desire. But not Liberty.
All moral codes and the philosophies that justify them are in fact, class philosophies. It is illogical for one to adopt a philosophy that is a disadvantage to one and an advantage to another – especially if that advantage plays out over the long rather than the short run.
I hope this was more helpful than confusing.