>A zero corporate tax rate would highly disincentivise corporate reinvesting into things like capex for expansion or R&D
This is simply not true. The investment equilibrium would change in favor of less investment in _lower_ return expenditures. Corporate managers would likely distribute more capital, which would then be reallocated efficiently in the market. The only hitch here is that the government would likely collect higher tax receipts, and thus lower total investment. But that's an argument for lowering the tax rate on investment income, not creating bad incentives for corporate managers to spend money with a lower marginal rate of return than their core business.
>There's also the fact that corporations are only made possible in the first places because of the infrastructure and services provided by the government, and those must be paid for.
Corporations pay property taxes, use taxes and payroll taxes already (e.g. truckers pay gas taxes, and that's reflected in retain prices etc). And since the proposal is for revenue neutrality, the delta revenue is still collected on the distribution end.
>Of infrastructure resources they used then indirect funding of such things via taxes would be required as much.
You can simply look at the budget. The vast majority of government spending is on income transfers, administrative expenses for social programs and jobs programs (the largest of which is bombing people in foreign countries). A very tiny sliver is infrastructure that corporations use. And as pointed out above, most of that can be paid for via use taxes they already pay.