The reality of Eastern countries' dependence on Western nations for decades has been evident. By the time Eastern countries realized that aid was merely another word for exploitation, they were already trapped in a debt trap.
You described them like they were ignorant to know what colonial wanted to do at the time. The fact is they were forced to accept such a situation for many reasons. Most important factor is to finish a long period of direct colonialism and enjoy as much soverignity as possible to rebuild. Unfortunetly, most of those countries were leaded by colonialism proxies who offered to colonialism easier access to greater opportunities.