Dutch had plans for a massive naval expansion, but they were never carried out IRL.
Kaiserreich world is a bit more militarized, so the ships were constructed, I'm sure one of the developers could tell more.
(I remember them being mostly manned by a native Javanese crews.)
Edit: Here is the post from Kaiserreich forums:
From Googling, some Historians state that the Netherlands had half the GDP of Italy in 1939 (so the Dutch IC should be more like 30).
As well, I noticed the Netherland ship classes are wrong, for instance the Java Class Light Crusiers are not Java class cruisers but a model too advanced.
For strengthening the Dutch, they had a Battleship Proposal in 1913.
http://en.wikipedia.org/wiki/Dutch_1913_battleship_proposal
Unlike Italy, the Dutch apparently may had been able to field that many battleships due to the wealth of the NEI (there were talks of forcing the NEI to pay for it through loans) and the battleships were seen as necessary by certain factions in maintaining hold over the NEI. The Dutch had the money, in the OTL, to build the Zuiderzee. For manpower, they apparently wanted to introduce Javanese Sailors to man these ships.
Therefore, I have made some model corrections, added 8 battleships, 1 carrier (which could be said to be from the hull of the 9th battleship), additional java class crusiers, destroyers, et cetera. Also added another submarine group as was requested in the 1914 proposal. Additional three battlecrusiers based on the 1047 Proposal, but during the interwar and assumed they were procured as a cheaper battleship and to fight off Japanese or Australasian battlecruisers, or intercept their shipping.
Alright. Thanks a lot for the help