Uneven sinking is not good - doors/windows won't close, walls would crack, and so on. It does not take much to seize things, however buildings are usually desig

Uneven sinking is not good - doors/windows won't close, walls would crack, and so on. It does not take much to seize things, however buildings are usually designed to take a little of it. The rate at which it's sinking is the alarming part. But i would be mostly alarmed about earthquakes - the thing sits on sand. Proverbial or not, that would make it very susceptible to soil liquification. Imagine a stick with a weight on top of it. On solid ground it stands still. But if the ground was to turn into a liquid, the stick would tilt and sink rapidly. If the soil were to liquify for a second, it would end up at an angle half-sunk. And a building can't tolerate side loads, so it won't stay at an angle - it would collapse down.