That's not the right comparison. The question should rather be, would they care if 10% of their tax revenue came from heroin sales?
And the answer would depend on where the externalities from all that heroin sale happened (e.g. if it was abroad), whether the government would be expected to carry the cost of them (e.g. by having a public healthcare system), and probably also on how actually democratic they are.
And the answer would depend on where the externalities from all that heroin sale happened (e.g. if it was abroad), whether the government would be expected to carry the cost of them (e.g. by having a public healthcare system), and probably also on how actually democratic they are.