CASR 175 is called " A licence to print money".
It is in Jeppesens interest, for example, to ensure that the process of becoming approved under CASR175 is as difficult, complex and expensive as possible, as well as maximising the costs and complexity of maintaining approval. This process is called building a "barrier to entry".
By doing that you will deter would be competitors from entering the market and can therefore charge exorbitantly for your product.
CASA needs to have clauses inserted into its rectum that require it to promote the aviation industry as a whole. One corrolary of such a clause is that you don't build unnecessary barriers to entry into aviation related markets.
To put that another way, does anyone think pocket FMS, Ozrunways or anyone else is going to spend the money to become CASR175 compliant? I can see myself buying paper charts for years to come even though I wont be using them at all. ....Just bought a Garmin D2 watch last week as well