INTRODUCTION
Tax is a kind of compulsory phenomenon almost in all the countries world over. Under any tax system the actual provisions of the taxes, the expenditure of proceeds being left out of the account, involves a calculated burden of sacrifice upon each taxpayer, and the burden upon different taxpayers bear certain relations to one another.
In order to make a comparison between different taxpayers and tax systems yielding equal revenues from a given set of people, there are thus provided with prima facie two criteria of merit first the quantum of the aggregate sacrifice imposed: and, secondly, the nature of the relationships between several items that make up this aggregate.