President Obama has likewise unilaterally repealed the legal requirement that welfare recipients must work, by simply redefining "work" to include other things like going to classes on weight control. If we think the bipartisan welfare reform legislation from the Clinton administration should be repealed or amended, that is something for the legislative branch of government to consider.
There have been many wise warnings that freedom is seldom lost all at once. It is usually eroded away, bit by bit, until it is all gone. You may not notice a gradual erosion while it is going on, but you may eventually be shocked to discover one day that it is all gone, that we have been reduced from citizens to subjects, and the Constitution has become just a meaningless bunch of paper.
ObamaCare imposes huge costs on some institutions, while the President's arbitrary waivers exempt other institutions from having to pay those same costs. That is hardly the "equal protection of the laws," promised by the 14th Amendment.
John Stuart Mill explained the dangers in that kind of government long ago: "A government with all this mass of favours to give or to withhold, however free in name, wields a power of bribery scarcely surpassed by an avowed autocracy, rendering it master of the elections in almost any circumstances but those of rare and extraordinary public excitement."
If Obama gets reelected, he knows that he need no longer worry about what the voters think about anything he does. Never having to face them again, he can take his arbitrary rule by decree as far as he wants. He may be challenged in the courts but, if he gets just one more Supreme Court appointment, he can pick someone who will rubber stamp anything he does and give him a 5 to 4 majority.