The death spiral birth rates(for whites) leads to two options - machete gov. spending to the bone(good luck with that) or import people to help to pay for the platinum welfare state.
The latter won't stop the inevitable unrest and instability. Immigrants who work - mostly Asian and Hispanic - are not likely to buy in to the idea that they must fund the welfare state (because they lack "white guilt"). The gravy train speeds on, but up ahead somewhere, the bridge is definitely out.