The unemployment of the unskilled (&/or semi-skilled) is a clear sign of the oversupply of unskilled (&/or semi-skilled) labour at the going price and this push

The unemployment of the unskilled (&/or semi-skilled) is a clear sign of the oversupply of unskilled (&/or semi-skilled) labour at the going price and this pushes the price down...how do you "get into the labor force?" The labor force is people who are working or seeking work (the BLS can give you a precise definition). Most of the poor do not fall into this category (see another reply of mine in this thread for data). Everything you describe is what would happen if the poor were willing to compete on price for work. The fact that they are not doing so is what pushes wages up.