According to the Halacha (Shulchan Aruch Orach Chaim 694:1), each Jew is required to send two matanos la’evyonim, charitable gifts, to at least two poverty-stricken Jews on Purim.
The Rambam (Mishneh Torah, Hilchos Megillah 2:17) points out that the more poor people one sends to, the better. In fact, he writes (ibid. 2:16) that it is better to spend more money on the gifts to the poor than on any other mitzva of Purim.
This idea is echoed in the Mishna Berura (694:3). Furthermore, as opposed to standard charitable contributions, we are to give liberally and with no investigations as to the veracity of the poor person’s claim needed.
The Chasam Sofer explains that the reason that we even give to the undeserving is because we were not entirely deserving of being saved in the Purim story.
The Klausenberger Rebbe explains that another reason for not needing to investigate is that we should not worry about where the money is going because H-Shem reversed the situation described by the Midrash (Esther Rabba 7:25) that the gentiles teasing the Jews that they would kill them and said, “we’ll take your money.” Since this fear was reversed, on Purim we should not worry where our wealth is going.
R’ Shmuel de Ozeida notes that there is a missing letter vuv in evyonim (“poverty-stricken”) to hint to this same idea that we do not need to investigate if the person is completely poor enough to be Halachically considered an evyon.
The Dena Pishra explains the inordinate focus on the poor on Purim as indicative of the fact that everyone was saved on Purim – rich and poor.
The Ben Ish Chai quotes the Midrash (Esther Rabba 7:23) that Haman mocked Pharaoh that he only killed the males (Shemos 1:16). Therefore, writes the Bein Ish Chai, the Halacha requires us to give matanos la’evyonim to two people because Haman, on the contrary, wanted to kill males and females.
The Peleh Yo’Eitz explains that this gift is meant to help the poor celebrate Purim, and not even worry about the upcoming costs of Pesach. Also, it would help strengthen the emunah of the poor, who regularly rely on the rich, and the rich rely on H-Shem.
The is similar to the anecdote when Mayer Anschel Rothchild was asked how he could shovel so much money to charity, and he famously quipped, “ G-d has a bigger shovel.”
The Gerrer Rebbe quotes the Talmud (Megillah 7b) that we are supposed to skip Torah learning and even prayer for the public reading of Megillas Esther on Purim, however chesed cannot be pushed aside. Of the three legs on which the world stands according to the Mishna (Avos 1:2), chesed cannot be removed for the world to remain.
The Alshich writes that one should mentally intend to give matanos la’evyonim in the merit of Moshe.
Rav Dan Segal notes that the mere idea that Moshe Rabbeinu requires our efforts in his honor demonstrates that we have so little idea of the heavenly impact of our actions.
To demonstrate a similar powerful idea, the Ben Ish Chai points out that the gematria of matanos (“gifts”) (40+400+50+6+400=896) is the same as manos (“gifts”) (40+50+6+400=496) and 400.
The number 400 in the Zohar (I:123b) represents evil influences. The verse uses this particular word for gifts to emphasize that giving matanos la’evyonim can provide us with the spiritual power to fight off unholy forces.
According to Shelom Esther, by appointing Mordechai in charge of Haman’s property, Esther was in effect making Haman’s family into Mordechai’s slaves.
R’ Avraham Mordechai and R’ Dovid Feinstein both quote the Talmudic (Pesachim 88b) dictum that what belongs to the slave is really the master’s. Therefore, Esther’s action returned Mordechai’s property back to him.
The M’nos HaLevi and R’ Shmuel de Ozeida note that Esther could not have given this to Mordechai outright because it was from Achashverosh (see Esther 8:1). It could seem like a slight to Achashverosh’s honor if she were to re-gift Haman’s property directly, so she appointed Mordechai in charge of it, instead.
The Sfas Emes interprets Haman’s estate as the other-worldly powers he amassed. At this point, Mordechai became the master of these. Perhaps this black magic can best be described as the power to change the spiritual world. Just as H-Shem placed us into a physical world where we can do such things as control electrical currents with switches and harness the wind with sails, He created our souls in a spiritual world which we can also affect if we want to.
The Maharal notes that this act points to a major theme throughout the entire Megillas Esther: that absolutely every single thing Haman attempted to do was turned around on him.
Rav Shmuel de Ozeida writes that, if Mordechai learned of this plot through prophecy, of course he had to do something with that knowledge. After all, one does not learn information through prophecy for naught.
Midrash Panim Acheirim posits that Mordechai reported this plot for three reasons:
By getting in the good graces of the king, Mordechai hoped to win permission to rebuild the Temple.
More generally, being liked by the king, Mordechai would be able to have influence for the sake of Jewish causes.
More practically, he had to do this in order to not be blamed for this plot. Although this would be neither the first nor last time a Jew is scapegoat in political intrigue, this is especially true according to the Ma’amar Mordechai’s opinion mentioned before that the plotters had originally attempted to sway Mordechai into joining their conspiracy.
The Ben Ish Chai brings from the Midrash (Bireishis Rabbah 39:12) that it is the duty of a Jew to save the world. Jewish advisers to foreign kings throughout our history have rescued them from impending doom whenever possible. Mordechai could not turn his back to this ancient tradition. Furthermore, writes the Ben Ish Chai, anybody would do similarly, at the least in order to avoid suspicion. The Maharal and the Me’am Loez both quote the Mishnah (Avos 3:2) that a Jew should pray for the peace in the government because anarchy and unrestrained progressive change can be dangerous.