Wapda and other companies know exactly what's going on, they just don't care because they get monthly chai pani. Yes, once higher authorities demand an explanation for sudden loss showing repeatedly, that's when they 'catch' them and appear in news papers:)
My dad's friend, he's SDO in Toba tek for Fesco and he caught a man selling electricity worth over 10 lac per month to hospitals etc. And he got caught. That too after 9 months.. Lol.
Guess who supplied him with a big transformer?