Believe me, doing construction on a house and planning a wedding to a Jamaican - I support the JA economy more than you'll ever know. LOL.
This is way off-topic from OP, but I'll get out my soapbox for this one reply.
Yes, all gov'ts protect their economy with tariffs - but the usual amounts are a small percent of the value of the item. There are political fights all the time in the USA whether or not to impose them, or to raise them - trying to balance protecting domestic sources vs harming the people by artificially inflating prices. It's the age-old balance of how high do you set prices before you start losing customers. Whole economic classes are taught on this "economic elasticity". If private industry gets it wrong, they lose customers to competitors - if gov't gets it wrong, there are no competitors, but they cause a black market to form. You're starting to see it with cigarettes in the USA (I'm a non-smoker, just talking economics not efficacy).
My opinion is JA has gone way past that line. In Jamaica, the gov't has such bureacracy and adds such a high duty (I have experienced it at over 100% the value of the item with electronics) - that the gov't is standing in the way of improving their economy. Thoses tariffs, taxes, duties, etc are NOT just on us tourists bringing down goods - it's also on the imports sold by retailers. The prices on electronics are double and triple the costs in USA - and those prices aren't charged only to tourists, Jamaicans have to pay them too - that is hardly helping the people. (I focus on electronics because that is what my experience in JA has been with)
Improving their economy and providing jobs would help their people more than any retail jobs protected by tariffs. And around the world, it's lower taxes and smaller bureacracies where economies are flourishing. Yes the gov't needs funds to run - but if they eliminated their excessive bureacracy, they would have a much less bloated gov't to fund.
Back to the black market, In JA you see it with all the corruption in the system. Because the system is so-filled with rules, red-tape, and fees - it's almost become part of the official system for many bureacrats to just fish for "fees to expedite" the process (most of the world calls it bribes). There is so much corruption - the gov't doesn't trust itself to have just one official handle a transaction. Try looking up the rules to bring in imports legally - like a JA business would do. It's why you have to go to agency A for one form, agency B for some approval, agency C to pay the fee, back to agency A with the stamps on the form from B and C - it's mind-boggling. I know the gov't is trying to clean that up, but their first step should be to eliminate what causes that corruption - excessive bureacracy and fees.
To sum it up, I just feel the lion's share of the hiked up prices in JA is due to the duty (aka taxes) and other fees the gov't adds to get their "cut" - not to protect domestic sources or help the people. If I thought paying these dutys was helping the people - I wouldn't complain about it so much. I just feel I am being forced to contribute to keeping the corruption going - and is actually hurting the people in the long run, not helping. I could be wrong, but is my opinion for the above reasons.
This pet peave against paying these taxes/duties has to be put in context. I try to do my part by giving directly to the people - and hate so much giving it to the gov't. When there, I tip my hotel maid every day what my fiance says is too much. I go out of my way to pay people who want to do some service or task for me - that I could really do myself. I would rather do that than just giving to the guys asking for a handout.
Soapbox is put away again.