as his own.......to misuse as he would ;-). He was under no obligation to give Mr Elliot an allowance or indeed, any money at all.

Look at this from Chapter One:

He was at that time a very young man, just engaged in the study of the law; and Elizabeth found him extremely agreeable, and every plan in his favour was confirmed. He was invited to Kellynch Hall; he was talked of and expected all the rest of the year; but he never came. The following spring he was seen again in town, found equally agreeable, again encouraged, invited and expected, and again he did not come; and the next tidings were that he was married. Instead of pushing his fortune in the line marked out for the heir of the house of Elliot, he had purchased independence by uniting himself to a rich woman of inferior birth.