Naked DSL internet is just as expensive as line rental plus ADSL

What I don't understand about naked DSL plans is that they all seem to be $20-$30 more than the equivalent regular ADSL plans, which is exactly how much you're supposed to be saving on line rental. For instance, on TPG, you have this:

ADSL2+ 100GB/month: $29.99
Naked DSL2+ 100GB/month: $49.99

That's the equivalent of a $20 line rental when Telstra charges $30. So you're not really saving all your line rental fees. Just a third. On iiNet it's this:

ADSL2+ 100GB/month: $29.95
Naked DSL2+ 100GB/month: $59.95

That's the full line rental fee you're not saving. The higher iiNet naked DSL plans are only $20 more than their equivalents, though, so that's the same $10 saving as TPG. The thing is, we were sold on these plans as a way to save your line rental fee, which makes sense as a concept, but if the fee is just built into the plan instead, that's broken. The only reason I'd do it is to avoid having a home phone, and I can do that anyway by not plugging one in.

Mokalus of Borg

PS - That's what I'm currently doing.
PPS - It worked out cheaper for me to do it that way.