yes, there is and i will show you.
health care, gun control, abortion, welfare, wealth gap, or gay marriage are not part of the business of congress, so you are correct here, however these issues which are of states governments can enter the federal court arena, when these things and people come into conflict, the first course of action would be to seek justice in a state court, however the federal courts can be petitioned to hear such cases.
the powers of the federal courts, do encompasses these things"
The judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made, or which shall be made, under their Authority;—to all Cases affecting Ambassadors, other public Ministers and Consuls;—to all Cases of admiralty and maritime Jurisdiction;—to Controversies to which the United States shall be a Party;—to Controversies between two or more States;— between a State and Citizens of another State,—between Citizens of different States,—between Citizens of the same State claiming Lands under Grants of different States, and between a State, or the Citizens thereof, and foreign States, Citizens or Subjects.
In all Cases affecting Ambassadors, other public Ministers and Consuls, and those in which a State shall be Party, the supreme Court shall have original Jurisdiction. In all the other Cases before mentioned, the supreme Court shall have appellate Jurisdiction, both as to Law and Fact, with such Exceptions, and under such Regulations as the Congress shall make.
What is different between congress and the courts is ....with powers of the court a case must be brought before it, without that happening the courts can do noting the render a decision, .........but congress acts on it own without anything.... against constitutional law.
to explain it a little better, today when issues of rights violations happen in America, congress thinks it their job to write laws to prevent these violations from happening again, however that is not correct congress has no such authority, when violations of rights take place, it is for the courts to act not congress.