So, to sum it up:
Halve trade values of all provinces, except the European ones (this will make European CoTs wealthier), increase the tax value of key colonial areas (like the historical spice area) significantly, so that Portugal, England and Holland can become rich by controlling these territories, instead of just trading and finally: decrease the manpower of all nations in Europe.
Perhaps also increase tax values of European provinces to stimulate war for them.
Would that do it?
Halve trade values of all provinces, except the European ones (this will make European CoTs wealthier), increase the tax value of key colonial areas (like the historical spice area) significantly, so that Portugal, England and Holland can become rich by controlling these territories, instead of just trading and finally: decrease the manpower of all nations in Europe.
Perhaps also increase tax values of European provinces to stimulate war for them.
Would that do it?