Pave driveway and garage

Good evening :)

Our new construction has started and now I am wondering whether I should lay drainage concrete (15cm thick) for the substructure of our driveway + garage or not? I am concerned about the stability so that normal cars can park there without the ground sinking. Or would a normal subfloor with sand / gravel / crushed stone (all properly compacted, of course) be no problem under such a load?
Thank you!

Topsoil out. Betonreycylig in. Compact with a vibrating plate. 5 cm of crushed stone on top. Surface layer on.

Topsoil out. Concrete recycling in.
Compact with a vibrating plate. 5 cm gravel on top. Surface layer on top.

So almost like I thought. I have about 60 cm topsoil, remove that, about 45 cm concrete recycling (although 20 cm frost-resistant sand, 25 cm recycling would also be possible?), 5 cm gravel and then surface layer?
Thanks for the quick info.