If we were interested in defence, all the (small) spending would be on anti tank and anti aircraft missile systems, logistics, and training our national guard, firemen, police and other citizens. We (the west) vastly outnumber the Russians, have more advanced technology, and hugely larger industrial capacity.
This defence spending is obviously not about Russia, and not about defence, it is firstly and mainly about making money and creating jobs to get ourselves out of the current economic disaster, and secondly about preparing for war with our next official adversary, whoever the Americans decide to nominate for that.