Wall Street is not a machine, and the tech bubble was nothing more than tech companies, one after the other, becoming publically traded companies. The tech industry has become completely saturated since then by either themselves merely existing, the fluidity of technological advancements, mergers, diversity (by companies like IBM for example) and bankruptcy.
The media hype is a critical component of the machine, rather than a means to something less intentional. Maybe "machine" is too dark a word. But it's short and to the point. How about: there are monied interests who have much to gain from promoting general participation in the stock market. They have the means with which to publicly celebrate their point of view and to manage public opinion into a similar stance. "They" do not have to be all in cahoots, in a back-alley conspiratorial way, but there are enough brokers, financial adivsors, and enough media presence dependent on widescale stock market participation that it seems simplest to call it machine, rather than something longer and more descriptive.