Where are you getting those numbers? When I googled "Real Madrid wages", these were the first 3 links that popped up:
https://www.totalsportek.com/money/real-madrid-player-salaries/
https://sillyseason.com/salary/real-madrid-players-salaries-69080/
https://www.capology.com/club/real-madrid/salaries
I don't necessarily trust these sources, but I don't think any are completely believable because there is always inconsistency over whether or not the figure is pre- or post-tax. Perhaps that explains the discrepancy between our numbers.
Additionally, Madrid hasn't really spent a ton on transfers in recent years. Jovic at 54 million pounds is their highest transfer since James in 2014. If they were wealthy enough to double the wages that Liverpool pays, I think they also would've been able to spend a bit more on transfers. And I realize they are going to be spending big this summer, but this is only after the windfall from the Ronaldo transfer, several years of light spending, and several expected departures.
I don't want to get too off topic, though. I just think Liverpool have started putting their players on very competitive wages, and that Salah is very good, but not in that very small handful of players that will have any club jump at the chance to sign him. He's paid more or less what he is worth, and he seems happy at Liverpool. If he leaves, I don't think it would be about money (just like it wasn't about money for Coutinho).