Alas, the work of public-interest lawyers is never done.

It's a play on an old proverb:
A man may work from sun to sun, but a woman's work is never done
Meaning that a man's traditional role as breadwinner may keep him occupied from sun-up to sundown, but the traditional roles of a woman demand even longer hours of work.

Ms. Clinton is implying that no matter how much work the lawyers do there will always be something else that needs doing.

The law is an impediment to change, and all forms are that... The good law achieves does not make up for the damage it does, and in the end law does not prevent revolution, but only make revolution more painful, and when one group or another holds power after a revolutionary upheaval they reinstitute law as their first act, and this act dooms them... When people have found some good situation, place, or idea; they set about with social forms to hold that good for all time, and keep change from sweeping it away... But what was once good always has the good sucked out of it while it is held in stasis by the very class set up as its guardians...

Law benefits a small group of people at the espense of the whole society... We in the U.S. have more people per capita behind bars than any other nation, and what good does it do??? Does it teach criminals a lesson??? We can see from the gulf oil disaster that the criminals are given free reins, and the poor are constantly harrassed by the lack of law among the monied class... The financial meldown which has become the chronic condition of government plundering the people to support the financial system which should support all the people is a result of law instead of justice...

Justice demands that the capitalists should be regulated, supervised and harassed... Justice is denied, so more injustice follows... A few short years ago, the Supreme court reduced the damages for the Exxon Valdize disaster to a fraction... What if they had doubled it instead??? What if they had sent the message loud and clear that such behavior would not be tolerated... Law as much as is possible tolerates injustice... The law has nothing to do with Justice, and the Supreme Court says as much, that they are about deciding constitutionality... Injustice was built into the constitution, and extra constitutional changes have only made the problem worse... So let the lawyers cry... They are all essholes..