you put into scouting is for your scouts. The International scouts bring prospects to your attention, while your college and HS scouts evaluate for the draft. The more money you have in scouting, the better they evaluate players for the draft.
But you dont want to overdo it, because you want to be able to sign 3 or 4 really good IFAs this season in addition to who you draft. And you can add to the 20 million in your prospect budget by not increasing alot of salary on your payroll and transferring the excess to your prospect budget