[WaitWaitWha]

I am not sure I agree with you on this. Although the Senate indeed has two per State, the House seats is by population. Correct me if I am wrong, but the US House the exclusive power to "initiate revenue bills, impeach federal officials, and elect the President in the case of an electoral college tie".

Because bills are _always_ full of pork (Gov funded projects that are specific to the representative's district), there is nothing that would stop a highly populated region representatives to divert all funds to their district, while taxing an other region higher. In essence, diverting not only shared funds, but levy punitive taxes on other regions.