The observations in the impugned order are that the object of legislature is to encourage industrial expansion which implies that incentive should remain applicable even where on account of industrial expansion small scale industrial undertakings ceases to be small scale industrial undertakings. We are unable to appreciate the logic for these observations. Incentive is given to a particular category of industry for a specified purpose. An incentive meant for small scale industrial undertaking cannot be availed by an assessee which is not such an undertaking. It does not, in any manner, mean that the object of permitting industrial expansion is defeated, if benefit is not allowed to other undertakings. On this logic, incentive must be given irrespective of any condition as the incentive certainly helps further expansion by reducing the tax burden. The concept of vertical equity is well known under which all the assessees need not be uniformally taxed. Progressive taxation is a well known element of tax policy. Higher slabs of tax or higher tax burden on an assessee having higher income or higher capacity cannot in any manner, be considered unreasonable