So really, it's a proposal to give US Defense contractors $100b+ to replenish and restock the DOD with new kit and munitions for the old kit and munitions that we're providing to Ukraine. Which then get into the use accounting tricks e.g. depreciation values, etc.

The annual military aid to Israel is a little different, it's more like a loss leader coupon: give Israel money that they have to spend with US Defense contractors, which then also incentivizes them spending their own budget on complementary systems that can be integrated with those systems, munitions, support contracts, etc.

Although in this case, I believe it's primarily munitions and other kit that the DOD already has in warehouses.

This is oversimplified, but I just see these headline figures always being confused for pallets of cash.