As far as "Culture" is concerned, dear please visit any RTO and any Customs Collectorate and compare them in terms of Offices, Vehicles, Staff and their Compliance, Facilities etc.
I have joined here in DGTR(Customs) Karachi and we three probationers have Toyota Surf 24 hrs on our disposal along with other vehicles.
Our senior batch who passed out on 5th June have been given Collectorate and charge of their choice on very next day along with Land cruiser,Prado,Toyota Crown etc.
And technically speaking this is the second whole batch (37th & 38th) who got first postings in Customs directly because of creation of IRS. Before this officers had to wait for many years untill they get customs postings. Promotion is a problem for some senior batches these days but due to limited induction(3 to 5) in cadre and massive retirement( around 70 officers in next 2 years) it will be settled soon...
In strategy it is important to see distant things close and take a distanced view of close things.