Malaysia tax law favor the rich... 

Looks like the rich can earn 5~6 figures income per year from dividends/interests
no need to pay any tax but the salary working person who earns the same 5-6 figures amount
per year have to pay income tax.

Also, depends on which level too and lifestyle that one chooses. 

Malaysia current household income divided into 3 levels:

T20 ~ RM 12500/month
M40 ~ RM 6250/month
B40 ~ RM 3000/month
Let say if one can get an investment dividends+interests yields avg 10% or more, matching those one of those income level,
over long term (tax free but not risk free: stocks, unit trusts, funds). Initial savings and investment target needed would be:

T20 ~ RM 1.5 mil
M40 ~ RM 750K
B40 ~ RM 360K
For safer and virtually risk free, generate very conservative average:5% (eg. EPF, CDs, ASNs, Sukuks, Bonds)
over long term, initial investment and savings target needed:
T20 ~ RM 3 mil
M40 ~ RM 1.5 mil
B40 ~ RM 720K

Of course, it doesn't factor inflation and so forth in the coming years as those numbers will change over time but
hey... tax free passive income is pretty good. 

Well, also let's hope the tax laws does not change  or raise any red flags otherwise LHDN also want their share.

PH thought of capital gains tax but later didn't proceed with it because they need the rich to support Malaysia. Introducing capital gains tax suddenly will anger them and they might pull out their investments. Plus, this tax will make people less interested to invest in Malaysian market.