Manchester City also made a lot of transfers in the early days of Arab capital. But they didn't win the championship in those years. Then they realized that first of all they had to find the right transfers and the right manager. They are a good role model for Newcastle United today. Newcastle United are following their strategy today. Also, Manchester City and Newcastle United were never dominant teams in the last 30 years. Manchester City have done it in the last years. But Manchester United were always the dominant team. So they have more pressure than Manchester City and Newcastle United in this regard.
That is why they agreed to deal with Pep, because no matter how much you spend, if you do not have a great manager then it's just for nothing. Look at how much United is spending, and the yare still bad.
I always say "fifa based transfers" for big clubs, sure in smaller levels that's not good, but a team like United, spending 50+ million on a player that is barely 80 overall at fifa? That's a bad move, I know fifa is not the real world, but if you are spending that much, you might be looking for a huge potential, and for a potential player do not spend that much today, it rarely works, give him "potential player" level of money.
Biggest example, Mazuairi or whoever that back they got, terrible player, well not terrible in general but not going to help with United back, and they spent so much on it, we already knew he wouldn't be great and we are just fans and it was known before the transfer and every fan warned the team, and they did it anyway and look at the result.
It's so clear that teams like Newcastle, United, even sort of Brighton, do not know what they are doing with the money they are spending. I think for United, they need to get a manager known for greatness but at a poorer team, like maybe Emery? Villa seems great and that would be awesome for United.