Is it ever too early to teach responsibility and restraint?

We have covered the first two of 10 habits of a healthy family culture. Today we expand the list to consider the following:

3. Establish healthy limits or boundaries.
Flourishing families don’t pretend their wealth doesn’t exist or refuse to use it, but they choose to live relatively ordinary lives. Adults practice the value of restraint by setting reasonable limits and boundaries for themselves in both financial and non-financial ways. They set similar boundaries for their children in order to actively teach them responsibility and restraint.