I can't speak for South Africa specifically, and I'm by no means an expert, but since there are no other answers, I'll chip in...
Saving is generally a good thing to do, so you should find a home for any 'spare' money at the end of month. Even if it's just a few quid/bucks/rand, it's still better to save it than to start thinking you're rich and squander it ...
Starting with a simple demonstration saving over 3 years
c = initial salary contribution
i = salary increase
r = rate of return
c = 48060*0.06
i = 0.026
r = 0.1
The deposits over years grow with salary increases
d0 = c = 2883.60
d1 = d0 (1 + i) = 2958.57
d2 = d1 (1 + i) = 3035.50
The accumulated savings with interest r are
s = d0 (1 + r)^...
The Mega Backdoor Roth IRA is achieved by contributing additional after-tax money to a 401(k), and then rolling those contributions into a Roth IRA.
Roth IRAs normally have an annual contribution limit of $6,000. Using a fully optimized Mega Backdoor Roth IRA allows ~$30,000+ of additional annual contributions to the Roth IRA.