Those things are already retrofitted. Ukraine already refurbishes old tanks and sells them to other countries, e.g. Thailand, under «Oplot» brand to fund line of 8x cheaper «Bulat» tanks for their own army.
Eastern Europe has much lower salary, so USA and Western Europe can fund 3-4x larger army using their soldiers. War simulators are proven to be very effective to train crews and commanders. I, personally, use «Hetman: War Stories» for Arma3 to improve my skills, with all helpers turned off, with weakest army against strongest at highest AI level. 1 life and no saves makes me wet and exhausted like real combat because of high price of error.
Of course, this is only one piece of defense, but important one. And, of course, local lobbies will try to steer money to their own defense projects, so such decision must be done at NATO or EU level.
Eastern Europe has much lower salary, so USA and Western Europe can fund 3-4x larger army using their soldiers. War simulators are proven to be very effective to train crews and commanders. I, personally, use «Hetman: War Stories» for Arma3 to improve my skills, with all helpers turned off, with weakest army against strongest at highest AI level. 1 life and no saves makes me wet and exhausted like real combat because of high price of error.
Of course, this is only one piece of defense, but important one. And, of course, local lobbies will try to steer money to their own defense projects, so such decision must be done at NATO or EU level.