No, again the point is not clear.
When people mention a concept, they are assumed to know it. If the concept is "third world", that corresponds to the page of Sauvy you read. People may not know that concept properly, and create a superstition, and oftentimes will: that does not mean that the concept is replaced by the product of its ignorance. The proper concept in intellectual use remains untouched by its misuse; its misuse cannot have pretensions of preeminence. The terms do not «lose meaning»: they are simply misused by the ignorant and shallow - which intrinsically forcibly have no authority over it; what happens is that a twisted meaning will be spread, and that is just a natural phenomenon of the life of concepts. The people in the street are not the authorities. The meaning of 'spleen' is determined by a subset of doctors and a subset of poets, not by the a mass of near-laymen.
When people hear of "Schroedinger's cat", some, maybe many, will probably think "Mr. Schroe was very lonely; one day he found a cat and got to be a happy fella...": that does not replace the proper concept introduced by Schroedinger. People will do any disservice to it, and that you can suspect - but still there is no legitimacy in assuming that when /specific/ people talk about Schroedinger's cat, they mean "lonely people finding comfort" instead of the difficulty in determining etc.