In the developed world (esp. the US), the hammer and sickle, symbols of labor, are not actually used that widely anymore. Industrial monocrop mechanised agriculture and assembly-line manufacturing processes, as well as the use of robotics means most workers are no longer swinging a hammer or sickle as they produce goods, such as food, for the society. tl;dr: As manual labor has changed in the US & developed countries, does this well-recognized Communist symbol need updating?
Bread in a house.
It's just as valid to symbolize what we're offering, instead of the people we're organizing. And if symbolizing the people means trying to fit a backhoe, the database symbol, and a deep fat fryer onto a flag, then maybe that's not the best choice for graphic design anymore.