European software companies don't go broke and AFAIK they have 0% tax credit for salaries (in most countries, I know there are some R&D schemes in UK).
In Sweden, salaries are 100% deductible. You pay company taxes on the profit you make. There is an option to capitalize some R&D expenses if you can show that they are directly responsible for a future asset that you can set a value on (like, a startup where all engineers work on a single product).
We're not talking about a tax credit at all though... We're talking about being able to deduct salaries paid.
A tax credit is usually an incentive, like if you spend 10k on solar panels you get to deduct the 10k and then the government might say "hey thanks for pushing renewable energy, deduct an extra 2k from your tax bill." That's a credit, which we're not discussing here.
I don't think that's what's being discussed here. The question is whether salaries are (completely) expensed immediately (reducing profits) or whether they are (partly) capitalised (which will reduce profits later but not now).