Do Christians need more children?

This question started to haunt me for last several weeks as the clergies of my religion began commanding their faithful to procreate profusely. Frequently they quote from Holy Bible: "Be fruitful and increase in number; fill the earth..." (Genesis 1:28).
“The husband should fulfill his marital duty to his wife, and likewise the wife to her husband. The wife's body does not belong to her alone but also to her husband. In the same way, the husband's body does not belong to him alone but also to his wife. Do not deprive each other except by mutual consent and for a time, so that you may devote yourselves to prayer. Then come together again so that Satan will not tempt you because of your lack of self-control.” Corinthians 7:3-5. They say children are a blessing, not a burden. More children mean more blessing. Of course this is quoted by priests who never had a marital relation in their whole life.

But I think if one has more children than he can emotionally and financially care for, he is not doing the right thing. Further only rich people could keep up so many children and they are not able share their love equally to all their children. If one had more he couldn't spend enough time with any one of them. If one has fewer kids then he has more money for their stuff. He can live more comfortably and can spend more time on each of them. When it comes to their upbringing one can put more effort into each one to try and have them turn out better.

Moreover, the country like India is nurturing a population check as most of the people are poor. Then how could Christians in India to stand against it? Are the Christians in India rich enough to care a dozen children in their family? Do the christian women need no rest from labour rooms? Today in the world the largest growing population is Muslims. Do the clergies then need Christians to overtake the Muslims? I hope there will be a rethink by Christian clergies.

K A Solaman