Summary

George Sutherland Ribnik v. McBride — Opinion of the Court

To say that there is constitutional power to regulate a business or a particular use of property because of the public interest in the welfare of a class peculiarly affected, and to deny such power to regulate price for the accomplishment of the same end, when that alone appears to be an appropriate and effective remedy, is to make a distinction based on no real economic difference, and for which I can find no warrant in the Constitution itself nor any justification in the opinions of this court.
Source: Wikisource

George Sutherland Ribnik v. McBride — Opinion of the Court

Of course, anything which substantially interferes with employment is a matter of public concern, but in the same sense that interference with the procurement of food and housing and fuel are of public concern. The public is deeply interested in all these things. The welfare of its constituent members depends upon them. The interest of the public in the matter of employment is not different in quality or character from its interest in the other things enumerated; but in none of them is the interest that 'public interest' which the law contemplates as the basis for legislative price control.
Source: Wikisource

George Sutherland Ribnik v. McBride — Opinion of the Court

Obviously, even in the case of businesses affected with a public interest, other control than price regulation may be appropriate, and price regulation may be so inappropriate as to be arbitrary or unreasonable, and hence unconstitutional. To me it seems equally obvious that the Constitution does not require us to hold that a business, subject to every other form of reasonable regulation, is immune from the requirement of reasonable prices, where that requirement is the only remedy appropriate to the evils encountered.
Source: Wikisource

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