LOL
Unfortunately thats not convincing enough...to address the issue from a price comparison point of view ONLY is futile, as you will find people on the other side of the fence who will always have a cost argument...no matter if its correct...imo the best way is to appeal to the hearts and minds of the regulators, and therefore find qualitative reasons why the cap limit is an issue
I actually only use 1GB...but be sure you will be scrutinised, when you stand in front of the regulator and have to defend your high cap requirement as a home user
mmm... So you have yet to experience the full capabilities of your broadband line

There is tons to do with your data allowance. Download movie trailers, download actual movies, legally. Just browsing around these days can pretty easily waste 2GB. Especially if there's more than one person on your line.
Electronic journals aren't just plain text document nowadays, you can get a journal with pictures and even video attached nowadays!!!

wow!
Free linux distros, openoffice (Granted you don't have to downlaod it every day), Norton Antivirus Intelligent Updater is a kewl 12MB or more, dunno how much data is transferred for automatic live updates though, but I geuss that it is a few MB's. You can stream the news, hundreds of reports from all over the globe, everyday..
www.reuters.com,
www.cnn.com,
www.bbc.co.uk etc.
Have I mentioned YouTube yet? That can also eat away at your cap.
And this is just some stuff you can do...
Granted, as you pointed out, everybody doesn't do these things, but there are people out there, like me, that does. Also, we are 3 people who use the line, we cannot afford to buy 3 x 3gig accounts... Realistically, very few people can.
I trust you have seen the error of yor ways and so then the error of ICASA's and telkom's ways too

THEY are at fault, because as was pointed out on these very forums at least a thousand times before, all the ADSL users in the country don't use their lines for just reading e-mails and mweb's text only news. Some of us are better informed than others and know of the other techno-joys out and educational resources etc. out there.
Thanks for bearing with me. (Only accept the thanks if you read through everyting)
EDIT: Yeah, as H-GP and dabouncer and myself pointed out, there is plenty to do with your data allowance. Lets rest this one for once and for all.