God, I would love it to be true! Yet, the simple reason for their limitations is because of the business model their owners have chose to follow.
You would expect that Liverpool as a a brand and business would be able to gain/borrow any necessary capital to pay for Keita if they wanted.
However, their board instead follow a model where they look to make an eventual profit and as such any expenditures is met by fans or income.
Let's not grumble as it'll ultimately cap their ability to match their major rivals who look far more willing to spend; the ol' speculate to accumulate.
So to summarise what you're saying, the owners buidness model is sell to buy??