Your point of energy consumption/ purchasing power driving/reflecting economic growth would seem true, more over than not there are exceptions to the rule. There is a threshold where additional consumption doesn't have the same effect, (diminishing returns).
http://www.sciencedirect.com/science/article/pii/S0360544206000338 <- Not sure if you have access to this.
This paper:
chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/
https://pdfs.semanticscholar.org/af3f/08c9340d5a0d6ef3ab080df80f2175ed7b4d.pdf
Looks at the OECD countries, great read. There are other papers that examine the lift off of the economy is due to inefficient electricity production but as the economy grows efficiency takes additional precedent. I'd never say Bangladesh is more "efficient", just compact, much of their industry is close to the coast compared to Pakistan's Punjab.
Pakistan has a 97% electrification rate compared to Bangladesh's 63% (2016). But we're comparing almost a difference of $200 some in per capita to a deficiency of 50% fossil.
The case of Singapore, it's a transit hub, I wouldn't be surprised if a little less than 1/2 of the oil is for ships in port or transit further. Pakistan is also an importer of oil for Afghanistan, who buys oil from the PSO? (someone).
You're points in post 107 are valid, I just didn't read the entire thread.