Economic: Acquiring more land would've given more opportunity to current and future settlers. Reaching coast to coast would be better for trade, as well as getting people to settle in these areas with like the homestead act (easy to settle near sources of water and fertile land, rather than midwest)
Social: Manifest destiny is seen as a god given right to america at this point, each president that pushes it, believed and persuaded people into believing this. Reaching coast to coast is also a goal(Similar to like the moon landing) in its impact.
You can say that it is caused by the annexation of texas, mainly due to support for annexation began to form at this point. As well as their land disputes with britain, causing a rise in patriotism and the newly co'ined term 'manifest destiny'
The Simon Commission came to India in 1927 to generate a report on how well the 1919 Government of India Act was working. The Government of India Act established the new Indian constitution and Great Britain appointed British officials to the Simon Commission in order to oversee the effectiveness of the constitution.
The one characteristic of command economy is that the individual pursuit of wealth is replaced by a concerted effort from all economic channels to improve society as a whole.