Boris –
I’m afraid I don’t follow your argument. I have seen candidates pay a lot of attention to race, religion, age and occupation.
I confess I haven’t given it more than a moment’s thought, but I would hazard a guess that yes, an Electoral College based on one of these features would still be an Electoral College, and thus still be a good thing. Of course, most of these things are fairly fluid and hard to keep track of. A lot of these things have little – or at least less – to do with political issues. States are stable, political entities, and thus make a good choice for districting.
The point is, minorities (whether they be of race, religion, age, occupation, whatever) are unevenly distributed among the districts. This guarantees that a candidate who takes too extreme a position will hurt himself in some places. Persian rug salesmen may be a bit extreme, but certainly we’ve seen candidates court farmers, unions, school teachers, etc.
Example: as a percentage of the total population, farmers are pretty small, and would have little power in a national election. It wouldn’t be long before candidates play to the majority and ignore farm issues, or use farmers as scapegoats, or balance the budget with farm taxes, etc. But in a districted election, we find farmers are concentrated in certain areas, and are a large voting bloc in certain states. A candidate who alienates farmers finds him/herself no longer just alienating a small percentage of voters, but a good chunk of electoral votes.
Substitute any other group (race, religion, age, occupation, or anything else relevant to issues) for “farmers,” and the EC protects them as well.