Dear Dumbass;
Any land sold to foreign governments would still be subject to the federal laws in place, hence they would not be totally free to do ANYTHING. Stupid fear #1 - down in flames.
Any crap could also lead to confiscation. Stupid fear #2 - down in flames.
No sales should be allowed to countries which do not allow US land purchases in those countries. This means a US growing faster than another country would have greater power to buy land THERE than it is HERE. Stupid fear #3 - blew up on the launching pad.
If prospective foreign buyers know they’ll be limited to what current Federal rules allow done, much of the Federal land in the west isn’t worth much. You won’t make much from the sale. Debt reduction down in flames. Feds might as well keep the land until an administration willing to allow productive use can sell it from much more.