It doesn't work in Scotland. One of the reasons the Premier league is such a lucrative product is because it is relatively competitive in that any team can beat another on any given day IMO. Take that away and you will lose some of the interest.
it doesnt work in scotland because celtic and rangers are brick (relatively speaking ofcourse). it works very well in spain because everyone in the world knows some of the best players play for barca and rm. just like how everyone knows some of the best players play for manu,city, chelsea.