Is the economy supposed to decide on the technicalities of the system? Are we going to let people who major in economics and politics make the most important decisions that people with an IT degree need to be making? If so, then I might as well tear apart my 'degree'.
We need both IT experts, economists and political thinkers in order to fully understand and decide the paths we choose to take. Bitcoin requires a multidisciplinary approach in order to gain a better and wider understanding of its mechanisms and effects. Not everything in Bitcoin can be understood from an engineering perspective, economic arguments and issues have been highly prevalent in the blocksize debate for instance. This is why the Bitcoin Unlimited Articles of federation states this explicitly.
Should they all be working together? Yes. Should people who major in economics and politics decide what the infrastructure can and can not take or what the better approach between 2 is? No. That's a job for the engineers and this is what they've been studying for their entire life.