Well not knowing the man nor his circumstances nor his life and all that, I am in no position to judge whether teh Lord or someone else gave him his riches. I am just simply making the general biblical statements that are 100% true 100% of the time!
If God did give him what he whined and pouted for like Israel in the desert, then god also sent leanness to His soul. IOW He got what he asked for but is not really enjoying it.
But as I said, I do not know any of the circumstances of this man, so I can only give the Biblical answers and not know what may or may not apply.
As a point of information, the children of Israel were not content with the manna that was provided and begged for meat. God gave them the meat in the form of a great flock of quail, on which the people gorged. But along with the quail, there came a disease which wiped a lot of the people out.
So, God gave them what they whined for, but judgment came with it, because the people weren't content with what God was providing for them. What this teaches me is that we should be content with what God provides for us according to His sovereignty. If He provides a well-paying job that enables a person to have a nice home, reliable car, and good food and clothing and all the bills paid without having to go into debt, then that is a blessing. If the person works hard in their job and gets promotion and becomes the CEO of the company and earns a seven-figure salary to enable him or her to vastly improve the lifestyle, that is also a blessing from God through His sovereign grace.
But if the person craves for wealth, and rides rough-shod over others, and uses office politics to defeat his rivals to the top job, or becomes a preacher giving false promises of prosperity and healing if the people send in their $100 weekly offering to his ministry, then God may give him the wealth, but there may be a judgment attached to it for not being content to trust the sovereignty of God in the provision of his needs.