Tax.. justice and equality in the estimated rules. Certainty and clarity. Convenience in the collection. Economy in expenditure

Are the rules of the economic return to Adam Smith in his book Nations and the wealth of these rules are still valid relevance to date, and is often based on the four Ved are:

1. Base justice and equality in estimated.

2. certainty and clarity base.

3. Base convenience in the collection.

4. The base of the economy in expenditure.