Heavy duty and sales taxes are very much needed in BD where the collection of income taxes and others are insufficient. How the govt can function without collecting an optimum amount of taxes?
Note also heavy taxes discourage people to own cars. More to the above, roads are very insufficient and the system is inefficient in BD. So, what do you think will happen with so many cars on the streets. There will be ten accidents in one second.
Dhaka (especially Old Dhaka), Chittagong, Rajshahi, Khulna, and all other district towns need renovation work to enlarge roads. Otherwise, any car industry will remain limited to utility vehicles.
So, it is necessary to do Land/ Area Re-adjustment or 区画整理 (Kukaku Seiri) in these Cities whereby an old locality is re-planned and re-built, people living in small/ shoddy houses are highly compensated to get out. Some houses, shops, or business centers are targeted and given a good price to move out.
A new township with wider roads, wide (say, 5m) footpaths, high-rise buildings, an efficient drainage system, and children's parks with toilet and water facilities are constructed under a Master Plan.
Nation-building is not limited to Padma or Rooppur, it includes what I wrote above. I have first-hand knowledge of the subject because I am a construction laborer in Japan.