Based on my exchange with wdaher, who seems to understand this well, it's a bit more subtle than that:
The salaries are of course expenses, but they are exactly offset by the value of the IP created by the R&D activities.
It's a bit as if you spent money on buying some materials. As long as the material doesn't degrade, the cash is gone but the value is the same and therefore won't reduce your taxes.
If that IP is amortized over a single year, it does not contribute to taxation, but it does if it is amortized over a longer period.
The salaries are of course expenses, but they are exactly offset by the value of the IP created by the R&D activities.
It's a bit as if you spent money on buying some materials. As long as the material doesn't degrade, the cash is gone but the value is the same and therefore won't reduce your taxes.
If that IP is amortized over a single year, it does not contribute to taxation, but it does if it is amortized over a longer period.