<rant>There was a time when people fought for the right to vote, but now days not as many people come as they used to<end rant>
Of course, people would rather go to the supermarket and do all those useful mundane things in life - such as picking which kind of spread they are to get for their lunch
tomorrow, rather than voting for who they want in power.
The thing about consumer sovereignity is that the consumers are monarchs, kings, queens, whatever you prefer to call them, so why not pick your government by the kind of condiment you have on your lunch?
Of course, the Greens would be barely-spreadable, extra chunky peanut butter (with a large sign saying 'WARNING: MAY CONTAIN NUTS' on it), the Conservatives would be extra smooth peanut butter that is a sinister shade of grey, and so on. (before anyone complains, I am only joking about these two examples)
The party campaign would be spent on producing something useful (for once) - such as peanut butter, jam, marmalade, vegemite or whatever the party believes represents them the best, and the rest on advertising it. On the day of the election, people would have their name crossed off at the shop, or whatever they do on election day, go and buy a jar of whatever it is that they're barracking for, then go home. All the jars would have pictures of the leaders on the jar and their political goals written next to the contents list.
Just pray that the Kraft people don't start up a 'Star Wars' peanut butter promotion on the day of the election.
The political party that sold the most condiment gets into office, and everyone who voted gets a cheap jar of spread.