Cap's House bill 491 that was proposed - redefines the arrangement as a lending arrangement as opposed to what has been called an "investment".
This is the subject of the discussion. That if the payments and draws were that of a loan and interest payments as opposed to how is being treated (currently).
A simple interest loan recalculation - of which I did over 1,000 for the FHLB would result in the government owing fannie and freddie a few billion each.