I get that, Wim, that there are many factors that contribute to pricing of an item. I won't dispute that. BTW, the cheapo Lumix is also weather sealed ("Durable splash and dustproof-sealed body is ideally suited for all-weather travel, when combined with splash and dustproof LUMIX G Mirrorless camera models").
But, having said that, in the end I am looking at my images and then that's all that counts and it doesn't really matter how many switches etc I had on the lens that I used. If I have to "study" the images to differentiate (...would you pass a blinded test... and bet the farm that you can correctly identify which lens shot what?) ever so subtle differences in IQ between the $1k PanaLeica and the $cheap kit Lumix, then I (personally speaking - you seem to be OK) would be disappointed in the PL.
Regardless, I am really interested in hearing Klaus' findings so let's see if the price difference is indeed justifiable (in my eyes). I do expect to see a clear winner in IQ with the PL outside the additional factors that drive up price of a product. if that's the case, it would be very attractive for sure.
Actually, the price difference is less than with lenses which are similar from other manufacturers (they're often a factor 2.5 to 3 going from consumer grade to pro lenses). Essentially the 12-60 PL is a professional grade lens, 2/3 to a full stop faster, has switches for IS and MF, unlike the consumer version, and is weatherproofed.
Also, if you study the image samples carefully, you may find that contrast with the PL is better than with the Lumix.
All in all, the price difference is not unreasonable IMO.
Kind regards, Wim