It's European invasion

In America, the rich get richer and the poor get poorer . We have so many millionaires who can afford those high-end brands, regardless of country of origin .
 We don't produce enough engineers or scientists for our needs here and must hire educated immigrants to fill those jobs . Education in America produces vast numbers of moderately educated citizens .
 Europe took decades to recover from WWII and now compete and produce as America once did . My point of view , FWIW.

@inna I agree with you

Question for us, as members of audiophile community, could be - what can we do to try and influence this unfortunate tendency in an effort to reverse it ? 

Inna...buy more stuff.  All comes down to consumption of the products.  The market will fill the voids, and then it's up to us to be picky. *G*  'Twas always thus...

inna-
good query. The companies that you cited realized that their counterparts are junk-sourcing to china. There are a few American originals still left.
There are a few Japanese originals left as well. Excellent points of view as above.