The phrase "a vast wealth" is correct and usable in written English.
It can be used to describe a large amount of money or valuable resources that someone possesses.
Example: "The philanthropist's contributions to the community were made possible by a vast wealth accumulated over decades of successful investments."
Alternatives: "an immense fortune" or "a great abundance".
She has a vast wealth of experience in this area".
His milk and honey route is one lined with job offers, private jets and a vast wealth.
Seismic studies of the Caspian indicate geological structures that might conceivably hold a vast wealth of hydrocarbons (and many areas have barely been explored).
There's a vast wealth of plays out there for us to get stuck into – the tricky thing is deciding which to do next.
"Scotland has 25% of Europe's renewable energy potential and a vast wealth of knowledge and experience to realise it.
"As the UK's largest rail operator with a highly experienced management team, we have established a vast wealth of knowledge with unrivalled expertise in operating every type of rail franchise.
Since then, the controversy has threatened to lift the veil of Swiss banking secrecy, which has driven a vast wealth-preservation industry that over decades has made Switzerland the world's largest repository of hidden wealth.
In it, 'Jew' is a synonym for a wheedler, a schemer, a miserly accumulator of vast wealth and a cheater on his fellows.
Cuker, unrestrained by deference, was credited by Giuliani with crafting a speaking style for him — a conversational persuasiveness — that became a political strength (and a source of vast wealth on the lecture circuit).
In exchange for half-ownership of Singer's new company, the strait-laced lawyer helped the brassy inventor turn his idea into the Model T of sewing machines: cheap, sturdy, culturally transformative and a source of vast wealth.
Many on Babuyan still remember the "before time," when there was a settled egalitarianism rather than every-man-for-himself enterprise, when no one here knew that the Ibatan were poor in a world of vast wealth.
