I have first hand experience with bureaucrats and im damn sure they are more corrupt than politicians. Basically a politician have to cater to needs of his electorate, provide jobs, roads, sewage, transformers and many stuff ive seen they pay from their pockets. If anything they have to handle hundreds of guests every day and care for them because they r voters. Bureaucrats on the other hand dont have to face election and are there for whole career, they dont give a shit and earn and only favour their relatives and offspring.
Every corrupt politician needs a corrupt bureaucrat to do the dirty work, usually politicians are dumb and its the bureaucrat that take a big share of the loot. I am 100℅ sure most bureaucrats are corrupt, more so than politicians.
In PTI govt, politicians cant do much and power been given to bureaucracy and hence increase in corruption. Raid houses of every bureaucrat and ull find more than this. They work with these organizations that do paperwork and make TORs for projects in such a way that the favoured company gets it. I just cant stand the faces of Pakistani bureaucrats, they are the worst scum on earth.