Agenda 2030, and depopulation. How will they achieve this? I don't have answers to that, but here's some posibilities:
Considering the va-xx-ines are causing women to skip periods, stop ovulating, have 20-day periods, edit: and miscarriages, etc., this will cause a whole generation of babies not to be born. If they keep pushing boosters and doses, then women (and possibly men) will be causing temporary infertility to themselves. Even just a 1% reduction in babies born in North America in one year would be 44k fewer humans in one year.
Induced infertility would have longer-term consequences than killing off the old, because that means those babies won't grow up to have their own children, whereas older people have already had children and only have a few years left anyway.