Private Health Care Loading?

Just wondering why the need is for Private Health Care to have the 2% loading on the top for everyone over the age of 30 that does not sign up to get it? Seems that it makes it fairly difficult for people to take it up if their circumstances change - such as getting their mortgage down to something that is actually liveable?
Often wondered why the Federal Government don't try some type of amnesty month where people that are over the age of 30 can sign up for it and not pay any loading or a reduced loading to encourage more people to sign up for it, clearly the more people that have it the cheaper it is for people to have it and at the same time it relieves the government of a heap of costs and waiting times in the public hospital system.
It was mentioned today that the rebate is to be means tested which is fair enough, my only question is if its still relevant to apply a loading fee for those that may not have been able to afford it at age 30 and are now facing much higher fees to take it on?
Often wondered why the Federal Government don't try some type of amnesty month where people that are over the age of 30 can sign up for it and not pay any loading or a reduced loading to encourage more people to sign up for it, clearly the more people that have it the cheaper it is for people to have it and at the same time it relieves the government of a heap of costs and waiting times in the public hospital system.
It was mentioned today that the rebate is to be means tested which is fair enough, my only question is if its still relevant to apply a loading fee for those that may not have been able to afford it at age 30 and are now facing much higher fees to take it on?