The fuel companies’ practice of using tariffs which charge a high rate for an initial number of units used before reducing to a standard rate means low fuel users (generally poorer people) pay a higher average rate than high users.
This is not the fault of fuel company directors; they’re employed to make maximum profits for shareholders and these unfair tariffs contribute to profits.
It is the fault of the Government and Ofgem who allow them to discriminate. The government should decree that domestic fuel companies must use only a single rate per unit for all of supplies. They should be allowed to apply discounts from for consumers who help reduce costs by paying by direct debit, for instance.
Companies should only be allowed to change rates on predetermined dates.