And I suspect that they will be able to pay a large part with the jizya they receive from the U.S. government. From Israel National News, with thanks to Sr. Soph:
(IsraelNN.com) Palestinian Authority (PA) chairman Mahmoud Abbas Monday approved monthly financial aid of at least $250 for families of terrorists the same day a suicide bomber killed five Israelis at an Netanya mall. Abbas approved at least $250 a month for families.
The PA also retains jailed terrorists on its police payroll and pays them monthly salaries as well as pensions.
For more information, see this piece by Rachel Ehrenfeld and Alyssa A. Lappen: The PA’s New Terror Law.