From the article:

>Andre lives in an apartment thanks to a city-run housing program, but he doesn’t have a job other than selling flipped merchandise.

His apartment is partially funded by the government.

> Is there another word for a person that "can't be a productive member of society to fund his own living" other than homeless?

Not that I know of. Of the ones that come to mind:

"Poor" just implies you can't afford nice things, not necessarily that you can't hold down a job to sustain yourself

"jobless" just implies you currently don't have a job (ie. unemployed), not necessarily that it's a long term thing.

"NEET" is closer, but is more associated with people living in their parent's basements than of the people profiled in the article.

I guess you could use the term "long term jobless" or something, but it doesn't exactly roll off the tongue.