With respect, that's not the case.
In the simplest terms, 7% a year doubles your money after 10 years.
Maxing out one's AVCs for (say) 30 years should create some extraordinary numbers. Compounding is one of the cornerstones of wealth creation.
yep and for a real example i had 150k in june 2009 in an old DC scheme I had left....now its at @320k