What if different kinds of equality contradict each other? For example equality before the law on the one hand (laws must be equal for everybody and should not discriminate) and material equality as promoted by economic rights on the other hand.
Material equality is often promoted by way of taxation based on legislation. The purpose of taxation is the redistribution of property. The problem is that redistribution only benefits one group of people and harms the interests of the rest of the population. Taxation laws do not seem to be equal for everybody and do not have the same result for everybody. It seems as if they discriminate against certain people. A wealthy person can claim that laws must be the same for everybody and that a law which forces one person to give and allows another to receive is illegitimate. A law against murder does not, at the same time, force one person to abstain from murder and allow another person to murder. So why should a law on taxation be allowed to discriminate?
First of all, there is no reason to believe that the principle of equality before the law is an absolute principle. It must be possible to make trade-offs between principles. If one principle – for example equality before the law – does serious harm to another principle – for example material equality – then it may be acceptable to sacrifice or limit one principle for the sake of another. Sometimes, one has to make a choice and one has to establish priorities. This goes both ways. Too much attention to material equality can be counteracted by way of the principle of equality before the law.
However, it may not be necessary to limit the principle of equality before the law. Taxation laws do not discriminate, at least when we define discrimination as giving something to one person and denying it to another without good reason. Economic rights indeed give something to one person and not to another. Even more so, they take away something from one person in order to give it to another. However, the former person is not denied the thing that is given to the latter. He or she has and continues to have the same thing as the one given to the latter. The consequences of taxes are equal for everybody because they make sure that everybody has the same minimum of material means. Taxation laws do not cause discrimination or inequality. On the contrary, they are designed to eliminate discrimination and inequality, not only at the level of material well-being but also at the level of political influence, because material inequality causes political inequality.
We have discrimination when a law only benefits one group of persons and when there is no good reason why other persons should not benefit. It is clear that there is no good reason why wealthy people should benefit from taxation laws in the same way as poor people, except of course when they themselves become poor. Everybody can be in a position in which he or she needs taxation laws.
The right to free speech does not benefit everybody in an equal way either. Some people gain more from this right than other people. A colored person suffering from discrimination needs this right more than a white, middle-class person without political worries. However, there is no reason to claim that this right contradicts the principle of equality before the law.