To be fair, while the government aren't habitually truthful about anything, they do face three important constraints. One is how much tax revenue they can extract from people, one is how much they can borrow on international markets, and one is how much money they can create without it being inflationary.
They certainly aren't willing to flex these constraints in favour of the railway industry. My personal view is that we should pay more tax in order to fund decent public transport. I've advocated for that in my personal and professional life for years, though lots would go to freight, light rail and bus services rather than the passenger services using Network Rail infrastructure. However, the general idea of being willing to pay more tax seems to be pretty foreign to most people who live in this country. The second constraint we are hard up against thanks to the foolishness of Liz Truss and Kwasi Kwarteng. The third constraint has been given away to the Bank of England to decide independently of the government, and they've decided we've got too much money supply so they'll reduce it, not increase it.
Does anyone seriously think that they can make a convincing argument which will be popular with British voters that the railway industry, as currently constituted, should receive more money by flexing one of those three constraints? I'd love to believe that someone's capable of making that argument.
In case of getting the railway running again, printing money is probably the best option.
The reason being that printing money only causes inflation if you end up with too much sloshing around the economy chasing too few goods and services. I don't believe that this is actually the case for the following reasons:
The furlough money only replaced wealth that wasn't being generated due to the economy being shut down, so there probably isn't much more money sloshing around compared to the size of the economy. The PPE money has gone off to the manufacturers and probably to the City, so won't be chasing goods and services.
We know where inflation is coming from - abroad - due to the weak pound and geopolitical factors.
Therefore what money there is sloshing around is better off being channelled towards domestic, preferably labour intensive industries and services that are less likely to lose wealth to imported inflation. Public transport is not only a domestic, labour intensive industry itself, which will help to retain wealth within the economy, it also facilitates people spending their money in other domestic labour intensive industries.
Whichever way you look at it, in the current circumstances, public transport is one of the better things to be spending money on.