What's so special about inclusion of the specific word "economy"???
It is EXTREMELY clear in many Constitutional clauses that our Founders were well aware of Government's interaction with economic affairs. That's why they specificly empowered Congress with methods of economic intervention, with the expectation that those powers would be utilized to BENEFIT the American People, NOT to maliciously PLUNDER our Middle Class.
ARTICLE I, Section 8. The Congress shall have power to...
To regulate commerce with foreign nations, and among the several states, and with the Indian tribes;
To coin money, regulate the value thereof, and of foreign coin, and fix the standard of weights and measures;
To promote the progress of science and useful arts, by securing for limited times to authors and inventors the exclusive right to their respective writings and discoveries;
There are many, MANY more examples.
So the Founders didn't use the specific word "economy". So what?