Financial help for overseas students

affected by the Covid19 economic fall out has been ruled a "no go" area by the government. They have said they "need to draw the line somewhere". 
The idea of drawing the line is understandable but in this instance it seems to me it is not necessary. There might be a solution, particularly for those part way through their courses.
I will put it to you as a question, "What if we gave those students a loan, a loan paid for out of the foreign aid budget?" 
Instead of paying back the loan in monetary terms here the student would need to agree to volunteer in their own country. They would need to volunteer to the value of the loan and in an appropriate area.  
It seems to me that this way everyone benefits. The students stay here and finish their courses. The money they get is spent here on fees, accommodation, food and other services. That helps this economy. Their own home countries benefit with the services of well trained young people who will need experience before moving into fully paid employment. 
Yes, I can see there might be opportunities for exploitation. It would cost something to run such a scheme too but it could be done.
We tend to believe that students from other countries either have jobs waiting for them when they get home or that they will get jobs easily. That is not necessarily true.  I know - from experience - that qualifications which are highly regarded in one country can be completely ignored in another. If you are not studying in your home country you can also be missing out on vital "networks" which will help you obtain a position. 
Requiring authorities in other countries to take on people who have qualified here - even for just a couple of years - would give everyone a chance to find out how useful someone is.  It could give people valuable experience.
It's an idea. Is there a major flaw in this that I have not considered?