Large companies and projects limit diversity and thus creativity. Of course they have other compensating advantages. This tax could always be avoided by splitting into truly independent companies. We could experiment with the limit to see how it should be set relative to national net worth. For most of the life of our nation democracy provided a constraint on the excess of large institutions.
Every person has exactly one vote regardless of their wealth.
The size of our country and the cost of media to contact large number of voters has significantly eroded this constraint.