That is a problem that has not been thoroughly explored. What has been motivational historically, and what is necessary to motivate in the future, do not have to be the same.
And even looking at history, the motivations of scientific development seems quite varied. War has been a key promoter of many fields of science, which has in turn lifted may people out of poverty. So we should have more world wars?
And even looking at history, the motivations of scientific development seems quite varied. War has been a key promoter of many fields of science, which has in turn lifted may people out of poverty. So we should have more world wars?