Perhaps to reduce the amount of federal government involvement in banking. The proposed legislation is a kicking out of federal government influence and intervention in housing and banking.
This provision/statute would cause closings and withdrawals from insured accounts to meet the new standard ($250,000 to $150,000), reduce the number of FDIC insured accounts (individual and joint checking and savings, IRAs, employee benefits, revocable trusts, irrevocable trusts, government accounts..) and/or spread them across a larger number of banks. These would be the immediate effects.