Well, yes. In a live game you totally would take money back from players if it was done in error - look at Rockforth in 'the other game' for instance.
ofc it makes less sense to take it back in an Alpha, especially when you already announced there would be a wipe in the next update. 10 years in and they haven't realised people don't like to lose stuff, even if it was a bank error in their favour
Oh that's understood, however players who are earning money doing in game content are being reset to a minimum amount each time they log on, this is the "no reason at all" bit.