Actually I think this has the potential to increase the connections between different fields because it will truly incentivize collaborations through a market mechanism rather than the bartering system which currently exists (i.e I'll trade you conducting this expt for authorship).

The way I envision it working is that the person who has the grand idea obtains a grant and then breaks it up into microgrants which are outsourced to specialists to conduct the expts efficiently. The results are then combined to obtain a broad understanding of the particular question being asked by the grant holder. The broad results can be communicated to all participants.