We've had these type of owners for quite some time, nothing new to it. Liverpools owners are hardly hardcore Liverpool supporters, they're businessmen as well.
Mourinho has spent a shitload in transfer fees, then there's the additional "free" signings of Alexis Sanchez and Ibrahimovic. Most money spent on wages in the league. He's had more than enough money to create "his team". I honestly fear for anyone who watches Manchester United play and think the issue is money spent, not tactics and what we're trying to achieve on the pitch.
Klopp took over Liverpool a season before Mourinho, insisted that the team plays a specific way, didn't always work due to some players being more limited at others, but there was a clear pattern of what he wanted to achieve, slowly they've been buying players that fit the pattern of football they aim to achieve and now he's pretty close to achieving it, he's built a side that looks like it can compete with a very strong Manchester City side.
Mourinho on the other hand has built nothing, he's busy complaining about lack of transfers because we didn't buy a new central defender to replace one of the two he's already signed. We've reverted to hoofing the ball up to a striker that's not even suited to that type of football. Whenever a player has the ball there's zero movement around him, there's no passing triangles so that the player with the ball always have two passing options.
The main problem is that Mourinho's ideas are outdated.