The same way all government spending doesn't lead to rampant inflation: by scraping money out of circulation largely with taxes.
Money is created by central banks, circulated by the government (including with 'entitlement programs' like UBI would count as, but also through things like spending billions on fancy jet fighters) and other banks (and there multiplied by fractional reserve banking).
It's then 'destroyed' by taxes and encouraging people to buy into government bonds and other things that slow down the flow of money.
These are all policy instruments that control how much money is flowing through the economy, and inflation is a product of that flow.
So the answer is, because they would raise taxes on it. A large portion of the money given out would just go straight into taxes from high income earners also getting UBI.
But also they could do things like lower the reserve ratio banks are required to hold to reduce the flow of money into the economy, instead choosing to create money through people instead of banks.
Money is created by central banks, circulated by the government (including with 'entitlement programs' like UBI would count as, but also through things like spending billions on fancy jet fighters) and other banks (and there multiplied by fractional reserve banking).
It's then 'destroyed' by taxes and encouraging people to buy into government bonds and other things that slow down the flow of money.
These are all policy instruments that control how much money is flowing through the economy, and inflation is a product of that flow.
So the answer is, because they would raise taxes on it. A large portion of the money given out would just go straight into taxes from high income earners also getting UBI.
But also they could do things like lower the reserve ratio banks are required to hold to reduce the flow of money into the economy, instead choosing to create money through people instead of banks.