The short answer, imo: Profit and control. Bought and sold out to Big Pharma, they’re working hand in hand to generate a steady profit stream, and use the human population as test subjects for experimental technology they wish to advance. And being driven by a technocratic agenda to enslave humanity (Agenda 30, Great Reset), vaccine passports, mandates and the like will help to achieve that goal and are an integral part of that agenda. Population control (eugenics) could also play a factor, as major figures driving the agenda (Bill Gates, for example, and several vaxx companies with direct ties to prominent eugenicists) openly wish to reduce the population, and if these injections end up killing more and more of the vaccinated, they serve that goal whether intentionally or otherwise.
I also think that they are a major means by which to perpetuate the ‘pandemic’, by creating disease, driving the emergence and spread of new variants and what not, and perpetual state of pandemic is the perfect way to fast track a tyrannical agenda to enslave humanity. And potentially genetic modification of recipients could be another major goal, for a variety of reasons, but that is speculation on my part; the other reasons are pretty well documented and have been openly planned well in advance.
Dear Lord... I think I need to get more involved in this