Well, following the premise that human culture has the inherit need to evolve and progress, you might say that humans have always been developing ways to improve technology. However, if you look into actual anthropological data, you'll see that this notion is actually a folk model fabricated by intensive agricultural and industrial societes. If you want a slower paced life without the need for extensive labor, perhaps you could look into the lifestyles of pre-agricultural or foraging peoples?
And in all actuality, people have the ultimate buying power that dictates what capatilistic companies produce. Not the other way around. Sure, there might be what some consider "propaganda" by companies like Nikon, Canon, and yes, even Leica. In fact, if you want hardcore propaganda, just read the Leica website! Leica's tactics aren't any better than those of any other company. They are all trying to sell the consumer a product. Their tactic is persuasion, not brainwashing. It's just that Leica is producing products that the average consumer doesn't seem to like very well!
Now, I'll end this post so I can do something better than waste a few minutes of my life, discussing an issue that is in no way important to the lives of any one of us.