We all missed the obvious flaw, but not Malinda. The full credit for detecting that you are taxed differently for the same service should go to the eighteen year old from Kurunegala – the ever vigilant consumer. He pointed out in the latest post in his local language blog for a 512/128 kpbs Wi-Max connection you may have to pay about Rs. 675 as tax (30%) but for a 512/128 kpbs ADSL connection you pay only Rs. 337.