Wealth generation used to be based on total population. It was changed to the current method for C#. Here is the post explaining why:
http://aurora2.pentarch.org/index.php?topic=8495.msg112448#msg112448
Yes, but the industrialisation multiplier (i.e., fraction of the available manufacturing workforce employed in TN industries) retains all of these benefits.
Annual Wealth Production = Wealth Production Rate * Total Service Sector Workers *
(Workers Employed in TN Facilities)/(Total Manufacturing Sector Workers)1) High population, low industry nations are now easy to handle as most of the population does not generate wealth (it is assumed that the wealth from agriculture and service is used to cover welfare, health, education, etc. with a net wealth of zero).
2) Conventional starts do not generate huge excess wealth
3) As a nation industrialises, its wealth generation capability grows naturally, which reflects historical trends.
4) The planned wealth reserve cap can be removed.
5) Financial centres grow in importance and have more of a wealth impact (in relative terms) compared to VB6.
High population, low industry nations will have a low industrialisation factor, hence the wealth generated by their service sectors would be correspondingly low. However, as more TN industry is added and a greater fraction of the manufacturing workforce is employed in them, the industrialisation factor will rise and thus the wealth generated will also increase.
The idea is that a colony with, say, a 55% service sector and a 40% manufacturing sector will have more workers available for manufacturing (for its size), while a colony with a 70% service sector and a 25% manufacturing sector will have fewer workers available for manufacturing, but will also generate more wealth because of the greater number of service sector workers (assuming, of course, that both colonies are equally industrialised).
I am mostly just interested in creating a trade-off between the manufacturing and service sectors. Right now, you want to maximise the size of the manufacturing sector because manufacturing workers both produce stuff and generate the wealth needed to produce that stuff, so there is an excessive incentive to spread population around into small colonies to "maximise" manufacturing workforce. By decoupling this, losing manufacturing workforce to the service sector no longer feels as bad because it now results in higher wealth generation (assuming, of course, that the industrialisation factor remains constant).