I don't know but Swiss isn't the only train system that works but also Spain, Italy, France. Poland has a growing better train system . The swiss system has it's advantages but it is also very expensive.
The advantage of swiss system is fast transfers. Hsr would likely break this system (no point in arriving faster if your connection gets longer by 10-15min
I'm Swiss and I disagree, and so do many experts. First of all, arriving earlier is always good, because many people who get off on that stop still arrive earlier. Also, people who connect to a different mode of transit, such as Trams or S-Bahns very likely can catch an earlier connection.
In addition, if we built proper high speed lines, would could increase the frequency so much that it doesn't actually matter anymore.
So it doesn't actually break the system, it improves it.
It might also worth it to check them out