If you have a problem paying a high salary then don't base the company in a high salary area. Any other place would be just as good and way cheaper. Also the origial author says someone is misappropriating money[1] on top of this! They definitely don't deserve more funding before they fix those two problems.
Technically Deno supports TS and I assume that is a transpilation step to JS. Not sure if they use TSC or their own “compiler” however. But it is baked into Deno at some point.
Relevant:
> I'm just going to be explicit. In 2020, Henry created 12 issues, commented 25 times, and created 29 pull requests. This is across all Babel orgs.
1: https://mobile.twitter.com/sebmck/status/1392019586833387522