Not sure why, but those are strange questions to ask.
The university sectors contribute hundreds of billions to the UK and created plenty of jobs. Students domestically and from overseas pay fees, rent homes, pay bills, buy groceries, shop at high streets and local stores which again contribute to jobs. Are you saying to deliberately suppress this sector to bring in lesser students from overseas?
I am not a fan of government enforced minimum pay but from an economy point of view, it is strange to even think of not wanting this sector to grow in the name of getting less foreigners in?