>> there is possibility that Russian troops might not leave when the exercise is over.

Why they would do that? Unless you organize a pro-West revolution like in Ukraine. It is possible but making people dirty poor and desperate can take a decade like in the latter case.

That's what the article is about. Most big employers work for Russian market. If Russia stops buying - Belarus doesn't have deep pockets to sustain for years without trade. People most often live from paycheck to paycheck, so if suddenly a lot of them lose their jobs - escalation will be quite rapid.