I was privileged to read a historical document of the accounting sent to the crown of progress in the Americas. These reports stressed progress was slow due to the conditions and the mortality rate of those indentured. Fewer than 5% survived a 7.5 year sentence. Average longevity was less than 3 years servitude. Many escaped and braved the North Carolina swamps they were draining, preferring to be consumed by gators and snakes.
2. The solution arrived at first by the Dutch (East India Trading Company) but later by all the major colonial powers was Africa. Africa was in complete disarray and many were starving due to erosion caused by the removal of many indigenous forests. Deserts expanded and the nations of Africa were in a continuous state of war.
To fund these wars the standard practice was to conquer neighboring tribes, take the survivors captive and sell them into slavery. White Europeans weren't running through Africa chaining up Africans, Africans were enslaving Africans. In fact our terms for Stocks and Bonds arose from the slave trade in reference to the stocks and bonds used during transport to the new world. European investors would purchase Stocks and Bonds identified as theirs. Upon arrival if the slave bound by your Stock or Bond was alive and had value you profited. There are still examples in various museums and the archives.