Not true. It's true only if you are an elite scholar, ie President's Scholar or SAF Overseas Scholar. "Farmer scholars" just get normal pay, and a bond.
Even so, not all President's Scholars make it to the elite-of-the-elite Administrative Service which pays as much as $320k pa to the best 32-year-old AO.
SAF Scholars also make a fair amount, but definitely not as much as the best AO.
But both scholarships offer you a comparatively better chance to become a Minister one day!