In the context of 'I think it is important for everyone to understand the extent to which First-Class mail is already carrying a disproportionate share of the institutional cost or overhead burden of the postal system.', does 'The burden is enough for first class mail to handle.' stand alone without direct association?
I think it is important for everyone to understand the extent to which First-Class mail is already carrying a disproportionate share of the institutional cost or overhead burden of the postal system.###The burden is enough for first class mail to handle.