But the original post did not accuse the government of trying to reduce the population, and neither have I. EVER.
You're making a lot of grossly mistaken assumptions, either about the government, or about the people who are sharing the evidence of the government coverup.
You might as well ask why would the tobacco companies purposefully cause a large group of people to become dependent on tobacco, and/or get cancer. Just try not to assume that we believe that either the government or the tobacco companies are trying to reduce the population, please. We parents who question or even criticize vaccine safety are getting tired of being painted as "anti-vaxers" (when our children were injured by vaccinations BECAUSE we agreed to let them be vaccinated), or paranoid zealouts who think that everyone is out to get them.
Let's try and have a mature discussion of the facts presented in the OP, rather than attack the messengers, shall we?
We don't debate whether or not the tobacco companies had valid motivation for covering up evidence that tobacco causes cancer, and we don't debate their motivation fo adding addictive chemicals to cigarettes. To try to debate the validity of motivation to cover up vaccine-induced autism cases will only call into question the motivation of the person instigating such a debate.