My sentence was not clear. I did not mean to imply that "social construct" exists only in discourse, but that there is a definite resistence within our socio/economic system to include disabled people in its political, economic and social life which marginalizes us...dangerously I might add.
Much of our economic marginalization is connected to our perceived lack of productivity, when people don't produce in a capitalist way(to generate profits) they are de-valued. Where I tend to differ from most of the disability rights thinking however, is that I do not load so much value on the issue of work. Since work is a means of moving beyond dehumanization and marginalization, some push the idea that the majority of disabled people can work. I do not and have serious reservations about the overall consequences that this line of thinking can generate. I don't claim anything silly like ALL disabled people can work(though some do), certainly there are those who cannot work and they should not be devalued for this, rather they should be decently provided for.
This is rather crudely written here, I explain it better in the book.
Marta Russell