The framers of the Consititution didn't even know what a corporation is, much less have any idea that it would someday control the government.
Maybe that's why.
What? You clearly have no idea what you are spouting off about now. Corporations have been around for, quite literally, centuries. They have had a say in politics since Monarchs were the "thang"...
In fact, the oldest corporation still running today is the Stora Kopparberg mining community in Falun, Sweden, which obtained a charter from King Magnus Eriksson in 1347. Yes 1347...
The founders knew what corporations were. Back then churches incorporated so that they could survive past any living member (so that they didn't end when the pastor "ended"). Shoot, it was corporations that FUNDED much of the discovery and trips to the "New World"...
Some examples:
The Dutch East India Company
Hudson's Bay Company
In the late 18th Century (when our nation was founded) English law defined a corporation as follows:
"a collection of many individuals united into one body, under a special denomination, having perpetual succession under an artificial form, and vested, by policy of the law, with the capacity of acting, in several respects, as an individual, particularly of taking and granting property, of contracting obligations, and of suing and being sued, of enjoying privileges and immunities in common, and of exercising a variety of political rights, more or less extensive, according to the design of its institution, or the powers conferred upon it, either at the time of its creation, or at any subsequent period of its existence."
In 1600 (yeah, before the founding) the British Monarchy granted the British East India Company (yeah, real original there eh?) a monopoly on trade to India. In a very short time they were earning 150% return on their investment... They were politically powerful and had "rights" granted through law.
The founders, in fact, severely limited the powers of the government and the States limited and legislated corporations (not the feds). In most cases it took an act of legislation to create one. Thus the huge monopolies were created as Limited Partnerships (Andrew Carnegie) and Trusts (Rockefeller) which exercised the owners personal rights as well as those of the company.
States were actually the ones that used permissive corporate registration in order to gain more revenue from the registration fees and taxation.
Anyway, saying that the founders had no idea the power and influence corporations could wield ignores actual history.