No it's not. There are indications that prosperity leads to lower birth rates. A lower birth rate is not necessarily a bad thing.

It took thousands of years for the population to increase to two billion by 1900. It took less than a century to get to six billion and then another twenty years to get to eight billion.

During that time, most of the population growth was in impoverished countries in Asia, Africa and Indonesia.

As the economies of many of those countries have improved, so has the birth rate decline. But at the same time, recognize that a significant part of the population decline is because many of the population is just getting older and dying out.

And to support that poverty increases birth rates. The population for Nigeria, which more than 90% of the population is considered to live in poverty, is expected to double from it's current population of 210 million to more than 400 million by 2050.

less kids die today. i guess if you just measure quantity yeah, you are correct. if you want to measure quality, infant death is a great metric.