>> J P Morgan Chase, Bank of America, seeking among other things “[c]opies of all bank statements” relating to Mr. Polselli and petitioners ..."

the above leave it open for "select * from records where customer_id = '...' " , DUMP all transactions.

but the definition of “in aid of the collection.” should be yielding a narrower query, not ALL (*) transactions may be in "aid of", some may be private and even sensitive in nature yet legit.

For example, the Banks could provide a sample schema (+data) with a GUI to IRS so their operatives can construct a query, providing a case/reason for requiring each column.

Also a good idea to create business accounts and run all biz transactions via that, keeping private accounts for personal use.