In order order for this Congress to pass a measure under the Articles of Confederation, there had to be unanimous approval between the states, since the Founders were very paranoid about centralized power.
The Indian Reorganization Act of 1934 accomplished that the Indians were granted back their assets which had been historically removed from them. These assets included land and minerals, but the larger idea behind it was for Native Americans to be re-assimilated into society and for economic self-sufficiency to be more readily available for the community, as well as a certain amount of sovereignty for the different tribes.
In post-war Japan, the United States implemented a policy of "rebuilding the nation" The Allies had learned their lesson after WWI, when they were too harsh on the losers.
