I see your point and right now SHA256 might be ideal.

The problem is government agencies who can afford to make a custom ASIC and then fill a whole building with them.

Some people on this forum predict a drastic decline in miners/hash nodes when their income only comes from fees, but this may or may not happen.

If all nodes including clients help out with CPU power to secure the network, then all treats would decline as the number of users grows.

I'm asking if somebody has alternatives making the security by "user/client CPU donations" more feasible.