It is especially to be noted that however high its authority and however true to the fundamental requirements of reputability it may have been at its inception, a specific formal observance can under no circumstances maintain itself in force if with the lapse of time or on its transmission to a lower pecuniary class it is found to run counter to the ultimate ground of decency among civilized peoples, namely, serviceability for the purpose of an invidious comparison in pecuniary success.

It is evident that these canons of expenditure have much to say in determining the standard of living for any community and for any class.

It is no less evident that the standard of living which prevails at any time or at any given social altitude will in its turn have much to say as to the forms which honorific expenditure will take, and as to the degree to which this "higher" need will dominate a people's consumption.

In this respect the control exerted by the accepted standard of living is chiefly of a negative character; it acts almost solely to prevent recession from a scale of conspicuous expenditure that has once become habitual.
A standard of living is of the nature of habit.

It is an habitual scale and method of responding to given stimuli.