It would probably be more beneficial for the regime to invest some of this money into paying the Cuban tourism workers a fair wage as an incentive for workers to provide better service so that the tourists would return.
But, given their “revolutionary” economic theories, they continue to treat the Cuban worker as a second class citizen in his own country catering to the needs of visiting foreigners who enjoy things that a Cuban, regardless of how hard he or she may work, has no hope of ever enjoying.
The regime's priority continues to be to exploit the Cuban worker, to squeeze every cent possible out of the tourist so that the corrupt nomenklatura that runs the tourist industry can continue to enrich themselves:
Many international visitors complain that Cuba is excessively expensive, especially because of a tax on required currency exchanges.
Most people who live in a free market system, will not return to a place where they feel they were being ripped off. Since in Cuba the ripping off is official, event more resistance exists.
Totalitarians do not understand the concept of voting, much less voting with your wallet.