There have been rumours that the Italian has met with Rashford's brothers Dane and Dwaine, who have their own agency.
"It's really strange to me," Meulensteen told talkSPORT.
"Sometimes these agents get far too much control, but that's just how the system works unfortunately.
"It's crazy and it causes problems for managers. I think a club the size of Manchester United should be able to look after that themselves.
"Pogba was already with him, but now Lingard is going and Rashford.
"It's not a good development in my opinion.
"His way is Raiola first and then the player, and not the interest of the club."