So stacey, though I may not sell your house to my friend without your consent, if I hire someone else to do so, THEY can sell your house to my friend without your consent?
Is that your claim?
Can you explain HOW you can hire someone to do that which you do not have the power to do yourself?
I don't understand the distinction you are drawing here. You can't hire someone to do something illegal, obviously. I can't hire someone to sell a house that I don't own for the same reason that I can't hire someone to kill another person - it's illegal. Electing a representative to pass laws, however, is not a crime (nor is it a "hiring," for that matter). So, yes, I can't hire someone to sell your house without your consent, but I can vote for someone who may in the future govern you without your consent.
Remember the maxims of law: Power derived is never greater than the source it was derived from.
Most elected officials need to be voted in by either a majority or a plurality of voters, so the "source" is that majority or plurality, not each individual voter.
AND
An agent can only exercise the power given them by the principal.
As far as I know, an elected official is not considered an "agent." That just makes sense - otherwise they could never pass laws with which other people disagree.
AND
That which I cannot do directly I cannot do by agent, proxy or representative.
This appears to be your own legal maxim, as obviously there are situations where an agents or representatives can do what you cannot. Elected officials spring to mind, as they can enact binding legislation whereas you (the citizens) cannot. As for agency agreements, things like durable powers of attorney may last through the incapacity of the agent and entitle the holder to do what the agent obviously can't (because he or she is incapacitated).
Explain HOW you can empower someone to do something, if you do not even have the right to do it yourself.
Use the example of You being a house owner, and me wanting to sell your house without your consent, but not being able to because it is not my house, yet I can still do so according to you, if I hire an agent to do it for me.
Please explain HOW.
Again, these are really two different scenarios. You cannot hire someone to do something that is illegal, such as selling someone's house they do not have title to. You can, however, elect a representative to do something you cannot, and have been able to do so in the United States for over 200 years.