California or another state needs to put a top-line revenue tax on corporations instead of a corporate income tax.
It could be a 1% to 4% top line revenue tax.
The income tax on corporations need to be instead a top-line global revenue tax so that corporations could not jurisdiction shop to avoid taxes, have phantom expenses (one company leasing equipment from another company, both companies owned by the same parent corporation), or other paper shuffling moves to avoid taxes.
The benefit would also preclude the politicians from using regulations, tax dedications, ... to favor or not favor their campaign contributor corporate executives, corporations and PACs setup by industry groups.
Extend this same top-line revenue tax without exemptions or deductions individuals as well.
Freeing up for more productive use the hundreds of millions spent annually by corporations, governments, and individuals on compliance, accounting and legal.
We already have state level sales tax collection which could be used to collect the corporate taxes.
The social security/medicare withholding for W2 per-paycheck could be used to have a line item for state top-level wage tax.
Capital gains, carried interest, and other less common tax events could be handled by the greatly reduced in scope tax revenue departments at the state level.
Depreciation and other long standing tax write-offs could be left to expire after 10 years with no new assets to be put in depreciation by corporations.