It's interesting that you say 60-80%, because that's how many people the guys behind Deagel.com estimate will be culled by 2025 after the coming collapse of the neoliberal world order: https://deagel.com/forecast

The Soviet system was less able to deliver goodies to the people than the Western one. Nevertheless Soviet society was more compact and resilient under an authoritarian regime. That in mind, the collapse of the Soviet system wiped out 10 percent of the population. The stark reality of diverse and multicultural Western societies is that a collapse will have a toll of 50 to 80 percent depending on several factors but in general terms the most diverse, multicultural, indebted and wealthy (highest standard of living) will suffer the highest toll. The only glue that keeps united such aberrant collage from falling apart is overconsumption with heavy doses of bottomless degeneracy disguised as virtue. Nevertheless the widespread censorship, hate laws and contradictory signals mean that even that glue is not working any more. Not everybody has to die migration can also play a positive role in this.