As censored pointed out. They did agree, they gave votes for land.
Should EU, or UN votes be done by popular vote? or should the countries get votes? It's a similar thing. The United states is a not one culture, and to give more power to one culture based on population density I feel is a recipe for disaster.
I'm sure the counter is that right now the underpopulated area wields that power... At least the electoral college takes the population density into account. New York, California, etc... have many more EC votes than other less populated states.
If the EC is not good, and a popular vote doesn't represent large portions of the country... what do you propose?