The document doesn’t say how much. I guess, it’s just an umbrella document. More detailed regulations will be eventually adopted. That said, my estimate would be 500€ max per month.

that would not work. 500€ is not enough to pay rent in most places.

it would have to something that covers your current living expenses, no matter how high they are, because unless you are young and single with a lot of flexibility, you are not going to be able to put a hold on all those expenses.

therefore the two reasonable options are: the government continues to pay your current salary, or it pays what you'd get if they'd hire you. the latter would disadvantage high earners, but that is somewhat reasonable.

anything less would unlikely get any people interested.