Their bill would provide as much as $1 billion in grants rather than loans.
It also provided $5.8 million in personal loans to 27 Arthur Young partners, according to the complaint.
The banks agreed to provide Mexico with $12 billion in new loans.
These programs provide over $150 billion a year in grants, loans and work-study assistance.
Japan said today that it would provide $850 million in loans to Mexico to help battle air pollution there.
Russian officials say one approach discussed by the fund would provide a total of $5.6 billion in new loans.
Farmers were also provided with up to $200,000 in loans over a period of nine years.
The legislation would provide $18 billion in grants and loans to help local communities build sewage treatment facilities.
The banks would provide $400 million in loans, on top of the $1.6 billion in guarantees sought from the government.
He said Japan provides Russia about $500 million a year in grants and loans.