The bigger the government, the greater the propensity for tyranny, poverty, and all other ills of humanity increases. If a large government jurisdiction, let’s say the federal or global government, enacts some ill-advised policies. The consequences of those ill-advised policies will negatively impact everyone. If a small jurisdiction, say a municipal government, enacts some ill-advised policies, only the residents of that jurisdiction will feel the effects of those policies. Geographically speaking, it would be easier for residents of the smaller jurisdictions to relocate after failed policies are enacted. If a federal or global government screws up, where can the people go? Also, a system of smaller jurisdictions enacting policies and ideas is the breeding ground for continuous improvement and innovation. Each jurisdiction will have variations in their policies and ideas. The jurisdictions with the best policies and ideas will thrive while the failing jurisdictions will need to follow their templates for success or risk becoming a backwater to other jurisdictions. If the federal or a global governing entity fails (ie. functioning as a tyrannical/authoritarian), there are few if any other templates to follow for improvements.
Dr. Kaku is a brilliant scientist. Many of his works regarding the future of science and technology are nothing short of fascinating. However, that does not give him any credibility when describing the proper role/form of government. Branding people who oppose big government as “terrorists” is dangerous and unacceptable. You would expect to hear poisonous rhetoric like this (branding people who disagree with expanding government reach as terrorists/extremists) in a tyrannical society, not a free society.