Bangladesh prioritizes economic development as there is no active threat to our security.
Large population can cut both ways, if you can contiue to grow your economy sustainablely, they become a huge asset With significant potential. But if your economy is in gutter, then large population is only a strain on the state to bear. BD does not want to see itself in the later situation.
You have to remember, even in 2010 BD's GDP was only $115 billions. Now it's $460 billions. We were quite poor even just a decade and a half ago. There wasn't lot of forex available to spend on large scale procurements. However, there has been lots investment in raising new military formations and building neccessary infastracture to accommodate them in the same period. Bangladesh army has increased nearly 30% in size since 2010. This decade focus has shifted more on procurements more. But current economic recession has set us back temporarily. But there are talks going on the Navy side.