"must either underpay (this is somewhat subjective) their laborers, or neglect to fully replenish the natural resources......"Underpay is totally subjective, not "somewhat". Failure to replenish natural resources is true in any/all systems/models. Globalization is exactly what has exacerbated the "increasing income gap". The development of new technologies is enhanced by capitalism. None of the problems you cite are unique to capitalism. Seems your's and other's solution (s) lie in some nebulous system of the future.