The tweet was likely referring to
this Knesset bill passed in December but if you do a search for
"how to join the IDF" or Lone soldier programs you find material on how foreigners are actually incentivized to fly over to Israel.
Again, foreigners sign up for different reasons....religious, swayed by propaganda etc. This
Canadian lady elaborated on hers. So, without a doubt, many do so for financial reasons.
There are three ways a lone soldier can serve in the Israel Defense Forces (IDF).
jewishjournal.com
Phil Miller in Declassified UK explores the issue of young British citizens serving in the Israeli army. Quite a number…
www.jewishvoiceforlabour.org.uk
Jewish youths from foreign countries are allowed to enlist in the IDF as “tourists” and receive residence permits under Israel’s Mahal (overseas volunteers) scheme, according to its official website. Many choose to remain in Israel after their service and acquire citizenship.
The scheme is supported by various agencies such as Garin Tzabar, which has an office in London. It advertises how immigrants who join the IDF can earn almost twice as much as their domestic counterparts, partly due to grants from Israeli government departments.
While Britons who join the IDF might not meet the Geneva Convention’s entire definition of a mercenary, they do meet certain aspects of the criteria. The fact that some are paid more than their Israeli counterparts appears to satisfy Article 47(c), which says mercenaries may receive “material compensation substantially in excess of that promised or paid to combatants of similar ranks and functions in the armed forces of that Party”.
Sidenote: this could be one of the reasons why we see such callousness from IDF soldiers....like as though they are having fun on the frontline...again if you are there for the money then it makes sense to broadcast oneself engaging in wholesale destruction.