This isn't to say that I would accuse the majority (or even very many) individuals in positions where they're able to leverage a lot of wealth of anything specifically this egregious, but rather that because they're able to control many resources because their efforts have enormous leverage (and therefore are worth more to the system they operate in), they can consume orders of magnitude more resources to gain comparably minuscule increases in personal utility.
In addition, because of how valuable their leverage makes their effort, when they cause damage whose negative value is on the scale of individuals, the disparity leads a system that's self-interested to forgive them much more quickly--if someone can get 1% more value out of 10 billion dollars' resources than anyone else, that system doesn't have any purely value-driven reason to replace them in their position if they should murder someone and its negative effects never amount to more than a couple million dollars' loss in value. From any ethical standpoint that holds "death at the whims of billionaires" incompatible with "certain unalienable rights", this is a problem.
I'm not making the suggestion that those who are wealthy should divest themselves of their wealth and donate it to charity, the point I'm intending to communicate is that such leverage shouldn't act as a pass to engage in unethical behavior.
Nothing is stopping someone from employing their wealth to build a yacht, fifteen McMansions, and a thirty-foot solid-gold Mothman statue just after getting off of a six-month prison stint for a billion dollars of ecological damage (all purely hypothetical but I would assert entirely plausible); that people exist with the right to exchange a colossal amount of wealth to be allowed to waste an equally colossal amount of actual effort and resources is the problem.
I won't say nobody has an issue with individual people being allowed to direct huge amounts of funding, but I would assert that more people recognize that extravagant waste for the purpose of status should not be scaled to the extant degree of wealth disparity.