University lecturer here.
My university loses thousands a year teaching a UK student, the income from international students (who are qualified as much as UK students by the way) does supplement UK students. Without them we'd have less UK students. You already know this from your posts, we don't get enough in funding or from UK fees.
If you think international students are too many, with the current funding model,
it will only increase.
I expect my university to increase the number of international students, it’s that or we shut up shop. OR we get a government that decided to invest in education for once. It’s the British people's choice. We choose not to.
Most of my colleagues believe this country is heading down the private route, like America, so your kids can look forward to international level of fees , so effectively even more than now, it will be the preserve of the rich or the very poor gifted scholarships.
The Ivy League has 5% international at undergrad, but fees of around 45 grand, it also has a pool of home students to choose from the size of Europe.
The only way UK students can be increased is (in the current funding model) a lifting of cap on fees, or more investment from the gov. Both are big no no's currently and have been for years.