Has art jumped the shark after WWI?

[abaris]

And yet, things like that obviously find their customers. High paying customers as this example shows.

A tin was sold for €124,000 at Sotheby's on May 23, 2007;[5] in October 2008 tin 083 was offered for sale at Sotheby's with an estimate of £50-70,000. It sold for £97,250. The cans were originally to be valued according to their equivalent weight in gold — $37 each in 1961 — with the price fluctuating according to the market.[1]

http://en.wikipedia.org/wiki/Artist%27s_Shit

But what about a Mondrian? It's as simple as can get.