The reason maybe religious - many of the Asians are held by the religious ideals (particularly in Asia) due to family expectations.  And image is very important to Aisian families.

Also maybe they just want to retain their dignity (difficult to do when shaking your pom poms and wearing skimpy clothing. 

This comment is a bit pc isn't it?

The establishment, the left and chattering classes are always trying to push back the boundaries of decency in society and people who try to uphold decent morals are labelled "prudish" by these clowns and yet here are these pom-pom girls doing something entirely innocent and just adding a bit of colour to the razzmataz and lofty implies these western girls are undignified and belittling religion. Utter nonsense.

Also maybe they just want to retain their dignity (difficult to do when shaking your pom poms and wearing skimpy clothing. 

http://www.thehollywoodgossip.com/2009/ … -pictures/

No it would be because they appeal more to a global audience

India has a population of 1,178,900,000
Bangladesh 162,200,000
The UK 62,000,000
Australia 22,200,000
New Zealand 4,300,000
South Africa 49,300,000
West Indies 37,500,000
Sri Lanka 20,200,000
Pakistan 169,100,000
Zimbabwe 12,500,000

I'm not convinced by your argument. Non-Caucasians would be an overwhelming majority in the cricket-playing world. And considering that the vast majority of the world's population is African and Asian they don't seem to be targetting the global market at all, do they?

I suggest that it may be because Indian ladies have much more self-respect and are therefore more conservative.

why are all the pom-pom girls in the IPL white caucasian?

Simple; because they are cheaper.