Sila & (Non)Remorse AN 10.1

Suppose a person does certain acts that are not in line with the precepts but he does not feel remorse because it seems to the person as an trifling act, for example taking something from his/her parents without their consent or gossiping and lying (as skillful means for example). What is the Buddhist answer to that? As I know, regarding lying and gossiping for example, it is quite clear that one shouldn't do it regardless of an alleged benefit.