People have been asking for gibs since the dawn of mankind.
Could also possibly be German slang, a shortening of "gibt" (a form of the word "geben", meaning "to give").
In America today, that is not true for millions of working class people. Then add corporations who prefer four part time workers to two full time workers, and it's clear that America penalizes those on the bottom half of the bell curve harshly.
Is that a society you are proud of? Where children starve? Where treatable diseases like TB are a public health risk (even to you)?
See: 'illegal immigrant'. The phrase could, and in a literal reading does, mean anyone entering the US illegally. When politicians talking about deporting 'illegal immigrants', it's understood that they mean illegal Mexican immigrants.
In the same way, 'gibs' could, in theory, mean any government handout. However, if you examine its specific usage you'll see a clear pattern.