The Netherlands don't invairably qualify for the World Cup.
They qualified this time, 2003,1996 , and nothing before that. So that makes three times since 1975.
Canada qualified early in the competitions history in 1979 and again this time.

You say that they have 'failed to show any improvement' but remember The Netherlands pay their cricket on a matting type surface for the most part. So it's not surprising they don't show any improvement.14 year old girls will knock your head off on that surface.
http://en.wikipedia.org/wiki/Netherl...l_cricket_team
They need a cash injection to make the infrastructure good enought for ODI's. This is slowly happening. Things like being excluded from the C and G trophy didn't help. they played v SL in 2006, when SL broke records, but when Bangladesh came in 2005 I don't think the Dutch or Irish played them. The irish played the WI in 2005, but the dutch didn't. They have official ODI status until 2009 and perhaps in that time they'll produce one professional cricketer. The rest are amateurs and pay their way/ask their boss for time off:etc
The Dutch tried to set up a cricket league in 2005 and you can read the results on crickinfo.

What it needs is a consitence approach were Scotland , Holland, Ireland and possibly Denmark get a ODI match v the Big boys touring England. Not the 'close your eyes and throw a dart approach' that the ECB shows. I suspect without pressure from icc none of it would happen anyway.
Instead we get the European tour http://en.wikipedia.org/wiki/Europea...p#Division_Two
which is a shambles.
The Netherlands may not be the best ODI outfit in the whole world and cricket may not be the top sport in that Country.
They have started to play more 4 day matches in the ICC intercontinental cup and beat Kenya to come second in group B
they were in a tough group in this world cup.
They need a lot more exposure to One day cricket to improve.