FWIW the Kushner family is seriously screwed up.
But this is *legal* and until such loopholes are closed, exploitation will occur. On the plus side, it brings in money to the US and people who won't be welfare cases.
I still remember "Billy Beer"
https://en.wikipedia.org/wiki/Billy_Beer
And he was the President's brother, not the sister of President's son-in-law.
As long as cash can be made, people will try to make some.