No, it wasn't the question; but it was a reason why it's unlikely to happen in Scotland. The bottom SPFL division would have to be a lot bigger than ten clubs for even one automatic relegation, never mind two, to come about.
(As an aside I'll note that relegating two from Scotland's lowest national division would effectively give a free pass to the Highland League Champs every year as for the moment it doesn't look like any SPFL club - Brechin perhaps apart [and they're dead against moving to the HL] or, just, maybe, Elgin City - would be relegated to it. Not that the Shire or Berwick made a good fist of competing in the LL.)
That Estonian league has only been running for 7 years. It lacks the history of the SPFL's predecessors.
2/10 is not only an issue if it's over 20%. Relegating 2 clubs is an issue in itself. The Football League in England only relegates two from its bottom divison of 24 (1/12, not 1/5) and you expect the SPFL to relegate the same absolute number of clubs each year? Even one automatic relegation is an issue in the short term.
I suspect that, as happened in England, relegation from the SPFL won't be expanded till a relegated club has managed to get back up.