The 28-year old's ten year stay with the Gunners end in the Summer and a pre-contract deal of £36m in five years has been signed with the Serie A champions.
He is in line to earn up to £140,00 a week with the Italian club, which works out at £7.2 million a season, although Cristiano Ronaldo is Juventus' highest-paid player.
However, Keown finds it staggering that the north London club are willing to let one of their prized assets leave for nothing.
However, as it stands the Arsenal star is leaning towards going overseas and the BBC claims Ramsey is ready to undergo a medical and sign a pre-contract as soon as he makes a final decision over his new club.
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'And I was very happy with him in the last match.
It is why a move to Juventus has appealed to him so much, with Massimiliano Allegri generally using a three-man midfield which will allow Ramsey to play the role he craves.
"His future is individually for him, for his family, his agent". Every day he's here with us, he's working very well.
Ramsey is said to have been given permission by Arsenal to fly out to Italy after Saturday's match with West Ham United to finalise a switch, which will go through at the end of the campaign.
And after Emery revealed on Thursday that the club can only afford to bring in loan additions this month, Keown believes last year's £100million spree on Pierre-Emerick Aubameyang and Alexandre Lacazette could be the real reason behind Ramsey's pending departure. The worrying part was that Wenger was not able to convince these players, who left in quest of big trophies to their rivals. He asked in Blackpool to play, he said: "Coach, I want to play".