If he isn't able to spend his full allotment than he isn't able to truly implement his international signing plan.
One leads directly to another.
As to why they might limit his spending, that's simple, it's their money.
We know the following.
Elias didn't spend all his allotment on the draft.
Elias didn't spend all his allotment on the International market.
According to the two coaches in question they were let go because of money.
The O's consolidated the ML pitching coach and director of pitching positions which is almost assuredly saving them money.
I can see cutting ML spending as close to the bone as possible when a team isn't in contention. But the draft, the International market, and coaching are areas they should be spending on.