Justice and equality are excellent ideals to aspire to. Since these ideals are offered as the reason why we pay taxes - to collect donations from the rich and use that money to provide resources for the poor so that it's more Just and Equal - nobody can credibly disagree with the need for taxes in a civilised society. The only trouble is, nobody really questions what is really meant by the concepts of Justice and Equality in the first place.
Questioning the meaning of legal concepts
Some legal concepts have an automatic effect on a debate, namely to kill the debate. If a concept reflects conduct that is self-evidently good or self-evidently bad, you don't expect anybody to quibble once the magic word is intoned. An example is the notion of 'fraud'. In law, they say that ‘fraud unravels everything’. You can do pretty much anything you want, really, but the minute fraud creeps in it’s game over.
Nothing can be lawful that is tainted by fraud, and activities otherwise lawful will become unlawful if they are pursued fraudulently. It doesn't matter how fantastic your plan is - if it amounts to fraud you can't do that. Someone should have explained this to Bernie Madoff before he rolled out his amazingly successful Ponzi scheme. Obviously the scheme worked, given that it ran for several decades with many happy customers, but unfortunately the deceptive element of the scheme was not considered acceptable by securities regulators, so he ended up in prison. That's the effect of fraud - it will always and automatically unravel your proposals.
The twin notions of Justice and Equality have exactly the same effect on rational discourse and every-day transactions. The minute somebody shouts ‘what about Justice, what about Equality!’ the debate is always and automatically ended. Whatever it was you were trying to say, before somebody raised the justice and equity points, you will have to stop talking now. There can be no further discussion. Whatever transaction had been entered into must immediately be treated as suspect, regardless of its causes or outcomes. Like fraud, Justice and Equality unravel everything.
Take for example the debate about taxes, i.e. the debate concerning whether it’s rational to impose a financial penalty on hard-working folk in order to redistribute their income to better uses. Here’s one way you could see that:
So, from Tamny's perspective you might say that “taxes are nothing more than a price placed on work” and that the economy will grow if people get to keep more of what they earn, because keeping what you work for is an incentive to work harder and produce more stuff. Before long, everybody will be working harder and producing more, at cheaper prices, so that everyone is better off. Simple as that, really, you might think:
From that perspective, it does seem unwise to have penalties on work. People should get to keep all the money they earn, except for maybe a small fixed levy deducted to finance roads, bridges and, conceivably, drainage systems. If there’s a penalty on work, people might decide not to bother, and just stay home waiting to be supported by…the taxpayers. Less productivity, less wealth to go round, less economic growth. So far this all makes sense.
But wait, what about Justice and Equality?
Oh no! What about the poor and hungry people out there who would either have to go out to work themselves and root for their own food or rely on private charity, or just die of starvation? What about all the people out there with less stuff than other people?
By this means, Justice and Equality immediately unravel the entire case against taxes. See how that works? That's because Justice and Equality do not function according to immutable universal principles. The precepts of Justice and Equality tend to reflect simply the speaker's opinions about the moral ideals they think we should aspire to.
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