Your assuming that everyone is being honest about the situation. It wouldn't surprise me if the agent has used Utd interest initially (he has multiple other Utd players on his books) to ward off Barca's attempts to reduce his clients salary again, but the more it has developed the more it has backfired, because you have a very interested party wanting to sign him, a club that is very interested in selling him due to their financial situation, and a player that at every turn is saying I love it at Barca. He has just bought a house there, loves the lifestyle and it is his childhood dream club - he respects Utd but he loves Barca. This situation feels very wrong to me, if FDJ doesn't end up at Utd, then Im sorry we have been led a merry dance by someone involved in the deal..
this doesn’t make a lot of sense
they don’t need to engineer interest from United to stop Barca reducing his wages
they don’t need to do anything for that, he has a contract they just need to do nothing