No employer in relation to an establishment to which any Scheme or the Insurance Scheme applies shall, by reason only of his liability for the payment of any contribution to the Fund or the Insurance Fund or any charges under this Act or the Scheme or the Insurance Scheme, reduce, whether directly or indirectly, the wages of any employee to whom the Scheme or the Insurance Scheme applies or the total quantum of benefits in the nature of old age pension, gratuity, provident fund or life insurance to which the employee is entitled under the terms of his employment, express or implied.