Abbas "is in no hurry to restart negotiations, despite the pressures on him, because he thinks that the unilateral path will get him further and that way he won't have to pay a political price," Zeev Elkin said on public radio.
Elkin's comments came just days before US Secretary of State John Kerry returns to the region for his fifth visit in just over four months in a bid to coax the parties into resuming direct talks which collapsed in September 2010.
The Palestinians in November successfully applied for upgraded UN status as a non-member state in a move sharply denounced by Israel and Washington as a "unilateral" move, with both insisting a Palestinian state can only arise out of bilateral negotiations.
Elkin, a hawkish member of Israeli Prime Minister Benjamin Netanyahu's rightwing Likud party, also reaffirmed Israel's refusal to return to the lines which existed before the 1967 Six Day War.
A similar stance was expressed yesterday by Yoram Cohen, head of the Shin Bet domestic security agency, in a meeting with MPs at the parliamentary committee on foreign affairs and defence.