Thank you, and yes I am
The world economy operated on the Gold Standard until something like 60 years ago. Under that regime each country's government would state a rate in their own currency at which they would buy an ounce of gold, and the exchange rates were calculated accordingly. The problem with the system was that exchange rates were essentially fixed, which created problems in a growing global economy. Ecomonies fluctuate, and if the exchange rate cantfluctuate with it it can create problems. Britain abandoned the gold standard in I think the early 30s, and with the the pound as the dominant currency at the time it wasnt long before other currencies dropped the system. The proposal was to go back to a gold standard sometime in the future, but WW2 ended that idea with Britian spending almost its entire gold supply on war.
The floating exchange rates we have today make a lot more sense. A currency is backed up by a country's entire economy, not just a hunk of metal. The exchange rate is determined by the balance of payments (exports and imports) and the money supply, the outcomes of which can freely fluctuate, but the government has just enough control over at any time to keep it from shifting too dramatically. As such the exchange rate is a slightly lagged but good indicator of an economy's health.
While I agree with you that welfare shouldnt be 'too' good, there is still a strong need for it for some sense of equality in the distrobution of wealth. Remember social welfare doesnt only cover a standard of living for the unemployed, but also for many millions of deserving people such as the handicapped, single parents, the elderly etc etc.
You sound like Milton Friedman and his laissez-faire policies. The problem with very little government intervention is that yeah, the economy will potentially thrive in a purely economical sense, but in a real sense the rich will get richer and the poor will get much, much poorer.
There is emperical evidence both ways on the outcome of more or less involvement in an economy from a government. The way I see it there's a choice between letting an economy run itself and maybe getting a great result or most likely run it into the ground, or keeping taps on the economy through fiscal and budgetary policy and it keeping it somewhere in the middle.
The government is involved either directly or indirectly in every single aspect of the economy, and if you take that control out, well I can tell you what happens for each specific case if you want.