Let me reiterate something so that there is clarity.
1. Having kids is good. Seriously - if you have 10 and want more, God bless you.
I mean that with all sincerity. I have no problem with people who have lots of kids and pray that you raise them to be godly.
2. What I have a problem with is the idea that not having a ton of kids is *fundamentally* ungodly or immoral. While there may be very selfish, evil reasons one might use birth control, I do not hold that every use would be thereby immoral.
The above should be old hat, well familiar positions to anyone who has read this blog.
Let me put forth a new contention.
3. To encourage children, not because they are a blessing, but rather so as to ensure that we acquire political or monetary power is... not a biblical reason to enjoin people towards reproduction. Indeed, instead of encouraging people to serve their children, it treats children as objects which we will use to our own ends. It's backwards.
So, in conclusion - if you want to have lots of kids - may God bless you greatly! Do not let anyone's foolish scorn dissuade you! However, let us not treat children merely as pawns in political games.