This is making me dizzy.
First of all. It does not say that Lukaku is making 12m gross at United in GBP. It says EURO, which would make it closer to 10m gross in GBP which is more in line which what Lukakus salary always is referred to = 200k GBP per week.
Then even if he has been offered 7,5m net per year, thats also being reported in EURO, which would make it around 6m GBP. Which is about what Lukaku is pocketing in United net.
So what I am seeing is that Inter seem to be willing to match his salary at United, nothing more.
Then there are the reports that Inter might not even be able to afford this because of their 40m FFP deficit and that if anything it requires them to sell Icardi. Think this might be a transfer that might take awhile.
That said, its too bad that journalists are not more detailed when comparing gross/net salaries and currencies.
But in summary, I dont think Lukaku will get higher wages at Inter if he does move. Matched maybe. IMO.